Branches of Mathematics

Pure mathematics

• Algebra
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Applied mathematics

• Dynamical systems and differential equations
• Mathematical physics
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• Information theory and signal processing
• Probability and statistics
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• Operations research

Related Topics

• Electromagnetic Spectrum
• Linear Equations
• Applied Physics
• Nano Technology
• Engineering Sciences
• Mathematical Medicine
• Fluid dynamics
• Computational Mathematics
• Gamma Ray Optics
• Onfrared Optics
• Relative Velocity
• Iciam
• Intelligent Imaging Neuroscience
• Biomedical Engineering
• Neuroscience Research
• Quantum Cosmology
• Brain Research

• Aglaonike
• Agrippa (astronomer)
• Almagest
• Amaseia
• Amasya
• Amun
• Anaximander
• Ancient Greece
• Ancient Greeks
• Apollonius of Perga
• Aratus
• Aristarchus of Samos
• Aristillus
• Aristodemus of Nysa
• Armillary sphere
• Astrolabe
• Attalus of Rhodes
• Augustus
• Augustus Meineke
• Autolycus of Pitane
• Babylonian astronomy
• Bion of Abdera
• Bithynia
• Byzantine Empire
• Callippic cycle
• Callippus
• Celestial spheres
• Celâl Şengör
• Charles Lyell
• Circle of latitude
• Cleomedes
• Cleostratus
• Conon of Samos
• Corinth
• Counter-Earth
• Dioptra
• Effusive eruption
• Egypt
• Egyptian astronomy
• Equant
• Equatorial ring
• Eratosthenes
• Euctemon
• Eudoxus of Cnidus
• Geminus
• Geocentric model
• Geographica
• Geography
• Georgian people
• Gnomon
• Greek astronomy
• Greek language
• Gyaros
• Heliocentrism
• Heraclides Ponticus
• Hicetas
• Hipparchic cycle
• Hipparchus
• Hippocrates of Chios
• History
• Hypsicles
• Imperialism
• Indian astronomy
• Isaac Casaubon
• Juba II
• Jupiter (mythology)
• Kingdom of Kush
• Mauretania
• Meton of Athens
• Metonic cycle
• Mural instrument
• Nile
• Nummulite
• Nuremberg Chronicle
• Nysa (Caria)
• Octaeteris
• Oenopides
• On the Heavens
• Peripatetic school
• Philae
• Philip of Opus
• Philolaus
• Philosophy
• Pliny the Younger
• Pompeii
• Pompeius Strabo
• Pompey
• Pontus
• Posidonius
• Ptolemy
• Pytheas
• Rhodes
• Roman Republic
• Seleucus of Seleucia
• Solstice
• Spherical Earth
• Stoicism
• Strabo
• Strato of Lampsacus
• Sublunary sphere
• Sultanhisar
• Thales
• Theon of Alexandria
• Theon of Smyrna
• Tiberius
• Timocharis
• Turkey
• Tyrannion of Amisus
• University of Milan
• Vesuvius
• Xanthus (historian)
• Xenarchus
• Zodiac
• 
  

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  Amasya
  Amasya (Turkish pronunciation: [aˈmasja]), the Amaseia of antiquity, is the capital of the administrative district of Amasya Province in northern Turkey. The population of the province is 334,786 and the population of the city is 99 905. The mayor is Cafer Özdemir (AKP).
  Amasya stands in the mountains above the Black Sea coast, in a narrow valley along the banks of the Yeşilırmak River. Although near the Black Sea, this area is high above the coast and has an inland climate, well-suited to growing apples, for which the province of Amasya is famed. As for natural beauty, Amasya is set apart from the rest of Anatolia in its tight mountain valley and hides its own secret beauty.
  In antiquity, Amaseia (Αμάσεια) was a fortified city high on the cliffs above the river. It has a long history as provincial capital, a wealthy city producing kings and princes, artists, scientists, poets and thinkers, from the kings of Pontus, through Strabo the geographer, to many generations of the Ottoman imperial dynasty, and up to being the location of an important moment in the life of Ataturk. With its Ottoman period wooden houses and the tombs of the Pontus kings carved into the cliffs overhead, Amasya is attractive to visitors.
  
  wn.com/Amasya
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  Egypt
  Egypt ⁱ/ˈiːdʒɪpt/ (Arabic: مصر, Miṣr, Egyptian Arabic: [mɑsˤɾ] ; Coptic: Ⲭⲏⲙⲓ, Kīmi ; Sahidic Coptic: ⲕⲏⲙⲉ, Kēme), officially the Arab Republic of Egypt, Arabic:  جمهوريّة مصر العربيّة (help·info), is a country mainly in North Africa, with the Sinai Peninsula forming a land bridge in Southwest Asia. Egypt is thus a transcontinental country, and a major power in Africa, the Mediterranean Basin, the Middle East and the Muslim world. Covering an area of about 1,010,000 square kilometers (390,000 sq mi), Egypt is bordered by the Mediterranean Sea to the north, the Gaza Strip and Israel to the northeast, the Red Sea to the east, Sudan to the south and Libya to the west.
  Egypt is one of the most populous countries in Africa and the Middle East. The great majority of its over 81 million people live near the banks of the Nile River, in an area of about 40,000 square kilometers (15,000 sq mi), where the only arable land is found. The large areas of the Sahara Desert are sparsely inhabited. About half of Egypt's residents live in urban areas, with most spread across the densely populated centres of greater Cairo, Alexandria and other major cities in the Nile Delta.
  
  wn.com/Egypt
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  Philae
  Philae (Greek: Φιλαί, Philai; Ancient Egyptian: Pilak, P'aaleq; Arabic: فيله‎, [fiːlɐ]) is an island in Lake Nasser, Nubia. It was formerly an island in the First Cataract of the Nile River and the previous site of an Ancient Egyptian temple complex in southern Egypt. The complex was dismantled and relocated to nearby Agilkia Island during a UNESCO project started because of the construction of the Aswan Dam, after the site was partly flooded by the earlier Aswan Low Dam for half a century.
  Philae is mentioned by numerous ancient writers, including Strabo,Diodorus,Ptolemy,Seneca,Pliny the Elder. It was, as the plural name indicates, the appellation of two small islands situated in latitude 24° north, just above the First Cataract near Aswan (Ancient Egyptian: Swenet, "Trade;" Ancient Greek: Syene). Groskurd computes the distance between these islands and Aswan at about 61.5 miles (99 km).
  Philae proper, although the smaller island, is, from the numerous and picturesque ruins formerly there, the more interesting of the two. Prior to the inundation, it was not more than 1,250 feet (380 m) long and about 400 feet (120 m) broad. It is composed of Syenite stone: its sides are steep and on their summits a lofty wall was built encompassing the island.
  
  wn.com/Philae
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  Turkey
  Turkey (Turkish: Türkiye), known officially as the Republic of Turkey ( Türkiye Cumhuriyeti (help·info)), is a Eurasian country located in Western Asia (mostly in the Anatolian peninsula) and in East Thrace in Southeastern Europe. Turkey is bordered by eight countries: Bulgaria to the northwest; Greece to the west; Georgia to the northeast; Armenia, Azerbaijan (the exclave of Nakhchivan) and Iran to the east; and Iraq and Syria to the southeast. The Mediterranean Sea and Cyprus are to the south; the Aegean Sea is to the west; and the Black Sea is to the north. The Sea of Marmara, the Bosphorus and the Dardanelles (which together form the Turkish Straits) demarcate the boundary between East Thrace and Anatolia; they also separate Europe and Asia.
  Turkey is one of the six independent Turkic states. The vast majority of the population are Muslims. The country's official language is Turkish, whereas Kurdish and Zazaki languages are spoken by Kurds and Zazas, who constitute 18% of the population.
  
  wn.com/Turkey
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  University of Milan
  The University of Milan (Italian: Università degli Studi di Milano, "Statale") is a higher education institution in Milan, Italy. It is one of the largest universities in Europe, with about 65,000 students, a permanent teaching and research staff of about 2,200 and a non-teaching staff of 2,200.
  The University of Milan have 9 schools and offers 134 undergraduate and graduate courses, 21 Doctoral Schools and 92 Specialization Schools. The University's research and teaching activities have developed over the years and have received important international recognitions. The University is the only Italian member of the League of European Research Universities (LERU), a group of twenty-two research-intensive European Universities. It is also the best university in Italy in several rankings.
  Throughout Milan, the University is commonly nicknamed and referred to as Statale (state) to avoid confusion with other private universities in the city, such as the Bocconi University, the Università Cattolica del Sacro Cuore and the Free University of Languages and Communication (IULM).
  
  wn.com/University_of_Milan

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  Aglaonike
  Aglaonike (Gr. Ἀγλαονίκη, fl. 2nd century BC), also known as Aganice of Thessaly is cited as the first female astronomer in ancient Greece. She is mentioned in the writings of Plutarch and Apollonius of Rhodes as the daughter of Hegetor of Thessaly. She was regarded as a sorceress for her ability to make the moon disappear from the sky, which has been taken to mean she could predict the time and general area where a lunar eclipse would occur.
  A number of female astrologers, apparently regarded as sorcerers, were associated with Aglaonike. They were known as the "witches of Thessaly" and were active from the 1st to 3rd centuries BCE.
  One of the craters of the planet Venus is named after Aglaonike.
  Aglaonike is a featured figure on Judy Chicago's installation piece The Dinner Party, being represented as one of the 999 names on the Heritage Floor.
  A Greek proverb makes reference to Aglaonike's alleged boasting: "Yes, as the moon obeys Aglaonike".
   This article incorporates text from a publication now in the public domain: Smith, William, ed. (1867). "^{article name needed}". Dictionary of Greek and Roman Biography and Mythology. 
  
  wn.com/Aglaonike
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  Anaximander
  Anaximander ( /əˌnæksɨˈmændər/; Greek: Ἀναξίμανδρος, Anaximandros; c. 610 – c. 546 BC) was a pre-Socratic Greek philosopher who lived in Miletus, a city of Ionia; Milet in modern Turkey. He belonged to the Milesian school and learned the teachings of his master Thales. He succeeded Thales and became the second master of that school where he counted Anaximenes and arguably, Pythagoras amongst his pupils.
  Little of his life and work is known today. According to available historical documents, he is the first philosopher known to have written down his studies, although only one fragment of his work remains. Fragmentary testimonies found in documents after his death provide a portrait of the man.
  Anaximander was one of the earliest Greek thinkers at the start of the Axial Age, the period from approximately 700 BC to 200 BC, during which similarly revolutionary thinking appeared in China, India, Iran, the Near East, and Ancient Greece. He was an early proponent of science and tried to observe and explain different aspects of the universe, with a particular interest in its origins, claiming that nature is ruled by laws, just like human societies, and anything that disturbs the balance of nature does not last long. Like many thinkers of his time, Anaximander's contributions to philosophy relate to many disciplines. In astronomy, he tried to describe the mechanics of celestial bodies in relation to the Earth. In physics, his postulation that the indefinite (or apeiron) was the source of all things led Greek philosophy to a new level of conceptual abstraction. His knowledge of geometry allowed him to introduce the gnomon in Greece. He created a map of the world that contributed greatly to the advancement of geography. He was also involved in the politics of Miletus and was sent as a leader to one of its colonies.
  
  wn.com/Anaximander
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  Aratus
  Aratus (Ancient Greek: Ἄρατος ὁ Σολεύς; ca. 315 BC/310 BC – 240 BC) was a Greek didactic poet. His major extant work is his hexameter poem Phaenomena (Φαινόμενα "Appearances"), the first half of which is a verse setting of a lost work of the same name by Eudoxus of Cnidus. It describes the constellations and other celestial phenomena. The second half is called the Diosemeia (Διοσημεῖα "Forecasts"), and is chiefly about weather lore. Although Aratus was somewhat ignorant of Greek astronomy, his poem was very popular in the Greek and Roman world, as is proved by the large number of commentaries and Latin translations, some of which survive.
  There are several accounts of his life by anonymous Greek writers, and the Suda and Eudocia also mention him. From these it appears that he was a native of Soli in Cilicia, (although one authority says Tarsus). He is known to have studied with Menecrates in Ephesus and Philitas in Cos. As a disciple of the Peripatetic philosopher Praxiphanes, in Athens, he met the Stoic philosopher Zeno, as well as Callimachus of Cyrene and Menedemus, the founder of the Eretrian School.
  
  wn.com/Aratus
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  Aristarchus of Samos
  Aristarchus (310 BC – ca. 230 BC), was an ancient Greek astronomer and mathematician who presented the first known model that placed the Sun at the center of the known universe with the Earth revolving around it (see Solar system). He was influenced by Philolaus of Croton, but he identified the "central fire" with the Sun, and put the other planets in their correct order of distance around the Sun. His astronomical ideas were often rejected in favor of the geocentric theories of Aristotle and Ptolemy.
  His name is Ἀρίσταρχος in Greek letters, which transliterates to Aristarchos. He was born on the island of Samos, in the eastern Aegean Sea.
  Though the original text has been lost, a reference in Archimedes' book The Sand Reckoner (Archimedis Syracusani Arenarius & Dimensio Circuli) describes another work by Aristarchus in which he advanced the heliocentric model as an alternative hypothesis. Archimedes wrote:
  Aristarchus thus believed the stars to be very far away, and that in consequence there was no observable parallax, that is, a movement of the stars relative to each other as the Earth moves around the Sun. The stars are much farther away than was generally assumed in ancient times; and since stellar parallax is only detectable with telescopes, his speculation although accurate was unprovable at the time.
  
  wn.com/Aristarchus_of_Samos
• Aristillus
  Aristillus (fl. ca. 260 BC) was a Greek astronomer, presumably of the school of Timocharis (c.300 BC). He was among the earliest meridian-astronomy observers. Six of his stellar declinations are preserved at Almajest 7.3. All are exactly correct within his over-cautious rounding to 1/4 degree. See discussion (and lessons) at DIO 7.1 ‡1 p.13 (2007).
  Aristyllos was long mis-dated to c.300 BC (which made his data look among the poorest of the ancients); but when his correct date was found by least-squares (Isis 73:259-265 [1982] p.263), it was realized that his star declinations' accuracy was unexcelled in antiquity. His data suggest that he worked in Alexandria: see DIO 4.1 ‡3 Table 3 p.45 (2004).
  A lunar crater, Aristillus, aptly near the Moon's meridian and at a lunar latitude roughly equal to the terrestrial latitude of Alexandria, is named after him.
  
  
  
  wn.com/Aristillus
• Attalus of Rhodes
  Attalus of Rhodes (Greek: Άτταλος ο Ρόδιος) was an ancient Greek grammarian, astronomer, and mathematician, who lived in Rhodes in the 2nd century BC, and was a contemporary of Hipparchus. He wrote a commentary on the Phaenomena of Aratus. Although this work is lost, Hipparchus cites him in his Commentary on the Phaenomena of Eudoxus and Aratus. Attalus sought to defend both Aratus and Eudoxus against criticisms from contemporary astronomers and mathematicians.
  
  wn.com/Attalus_of_Rhodes
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  Augustus
  Augustus ( /ɔːˈɡʌstəs/;Classical Latin: [awˈɡʊstʊs]; Latin: Imperator Gaius Julius Caesar Augustus; 23 September 63 BC – 19 August AD 14) is considered the first emperor of the Roman Empire, which he ruled alone from 27 BC until his death in 14 AD. Born Gaius Octavius Thurinus, he was adopted posthumously by his great-uncle Gaius Julius Caesar in 44 BC via his last will and testament, and between then and 27 BC was officially named Gaius Julius Caesar. In 27 BC the Senate awarded him the honorific Augustus ("the revered one"), and thus consequently he was Gaius Julius Caesar Augustus.
  The young Octavius came into his inheritance after Caesar's assassination in 44 BC. In 43 BC, Octavian joined forces with Mark Antony and Marcus Aemilius Lepidus in a military dictatorship known as the Second Triumvirate. As a triumvir, Octavian ruled Rome and many of its provinces. The triumvirate was eventually torn apart under the competing ambitions of its rulers: Lepidus was driven into exile, and Antony committed suicide following his defeat at the Battle of Actium by Octavian's fleet under the command of Agrippa in 31 BC.
  
  wn.com/Augustus
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  Augustus Meineke
  Johann Albrecht Friedrich August Meineke (December 8, 1790 – December 12, 1870), German classical scholar, was born at Soest in Westphalia.
  After holding educational posts at Jenkau and Danzig (now Gdańsk, Poland), he was director of the Joachimsthal Gymnasium in Berlin from 1826 to 1856. He died at Berlin on 12 December 1870. He was distinguished in conjectural criticism, the comic writers and Alexandrine poets being his favourite authors.
  His most important works are:
  See monographs by F. Ranke (1871), H. Sauppe (1872) and E. Förstemann in Allgemeine Deutsche Biographie, XXI. (1885) also Sandys, Hist. Class. Schol. (1908), iii. 117.
  
  
  
  wn.com/Augustus_Meineke
• Autolycus of Pitane
  Autolycus of Pitane (Greek: Αυτόλυκος ο Πιτταναίος or Πιττανεύς) (c. 360 BC – c. 290 BC) was a Greek astronomer, mathematician, and geographer. The lunar crater Autolycus was named in his honour.
  Autolycus was born in Pitane, a town of Aeolis within Western Anatolia. Of his personal life nothing is known, although he was a contemporary of Aristotle and his works seem to have been completed in Athens within the years 335 BC and 300 BC. Euclid references some of Autolycus' work, and Autolycus is known to have taught Arcesilaus. Autolycus' surviving works include a book on spheres entitled On the Moving Sphere and another On Risings and Settings of celestial bodies. Autolycus' works were translated by Maurolycus in the sixteenth century.
  
  wn.com/Autolycus_of_Pitane
• Callippus
  Callippus or Calippus (Greek: Κάλλιπος; ca. 370 BC – ca. 300 BC) was a Greek astronomer and mathematician.
  Callippus was born at Cyzicus, and studied under Eudoxus of Cnidus at the Academy of Plato. He also worked with Aristotle at the Lyceum, which means that he was active in Athens prior to Aristotle's death in 322. He observed the movements of the planets and attempted to use Eudoxus' scheme of connected spheres to account for their movements. However he found that 27 spheres was insufficient to account for the planetary movements, and so he added seven more for a total of 34. According to the description in Aristotle's Metaphysics (XII.8), he added two spheres for the Sun, two for the Moon, and one each for Mercury, Venus, and Mars.
  Callippus made careful measurements of the lengths of the seasons, finding them (starting with the spring equinox) to be 94 days, 92 days, 89 days, and 90 days. This variation in the seasons implies a variation in the speed of the Sun, called the solar anomaly. He also followed up on the work done by Meton of Athens to measure the length of the year and construct an accurate lunisolar calendar. The Metonic cycle has 19 tropical years and 235 synodic months in 6940 days. The Callippic cycle synchronizes days per orbit and rotations per orbit within the Metonic cycle, noting the difference of one after 4 Metonic cycles, a duration of 76 years. Distinguishing rotations and days infers knowledge of the precession cycle.
  
  wn.com/Callippus
• Celâl Şengör
  Ali Mehmet Celâl Şengör (born March 24, 1955) is a Turkish geologist. He is currently on the faculty at Istanbul Technical University, Department of Geological Engineering. He received his PhD from the State University of New York, Albany in 1982. He also writes weekly popular science columns in the center-left daily Cumhuriyet. He is married with one child.
  Since 2004, Professor Şengör is a (foreign) member of The American Philosophical Society and United States National Academy of Sciences.
  
  
  
  wn.com/Celâl_Şengör
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  Charles Lyell
  Sir Charles Lyell, 1st Baronet, Kt FRS (14 November 1797 – 22 February 1875) was a British lawyer and the foremost geologist of his day. He is best known as the author of Principles of Geology, which popularised James Hutton's concepts of uniformitarianism – the idea that the earth was shaped by slow-moving forces still in operation today. Lyell was a close and influential friend of Charles Darwin.
  Lyell was born in Scotland about 15 miles north of Dundee in Kinnordy, near Kirriemuir in Forfarshire (now in Angus). He was the eldest of ten children. Lyell's father, also named Charles, was a lawyer and botanist of minor repute: it was he who first exposed his son to the study of nature.
  The house/place of his birth is located in the north-west of the Central Lowlands in the valley of the Highland Boundary Fault. Round the house, in the rift valley, is farmland, but within a short distance to the north-west, on the other side of the fault, are the Grampian Mountains in the Highlands. His family's second home was in a completely different geological and ecological area: he spent much of his childhood at Bartley Lodge in the New Forest, England.
  
  wn.com/Charles_Lyell
• Cleostratus
  Cleostratus (ca. 520 BC; possibly 548 BC to 432 BC) was an astronomer of ancient Greece. He was a native of Tenedos, and the Chaldean astronomer Naburimannu may have been a contemporary of him. He is believed by some scholars to have introduced the zodiac (beginning with Aries and Sagittarius) and the solar calendar to Greece from Babylonia. Censorinus (De Die Natali, c. 18) considers Cleostratus to have been the real inventor of the octaeteris, or cycle of eight years. The octaeteris was used before the Metonic cycle of 19 years, and was popularly attributed to Eudoxus. Theophrastus (de Sign. Pluv., p. 239, ed. Basil. 1541) mentions him as a meteorological observer along with Matricetas of Methymna and Phaeinus of Athens. Gaius Julius Hyginus (Poetica Astronomica, ii. 13) says that Cleostratus first pointed out the two stars in Auriga called Haedi. The crater Cleostratus on the Moon is named after him.
  
  
  
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• Conon of Samos
  Conon of Samos (Greek: Κόνων) (ca. 280 BC – ca. 220 BC) was a Greek astronomer and mathematician. He is primarily remembered for naming the constellation Coma Berenices.
  Conon was born on Samos, Ionia, and possibly died in Alexandria, Ptolemaic Egypt, where he was court astronomer to Ptolemy III Euergetes. He named the constellation Coma Berenices ("Berenice's Hair") after Ptolemy's wife Berenice II. She sacrificed her hair in exchange for her husband's safe return from the Third Syrian War, which began in 246 BCE. When the lock of hair disappeared, Conon explained that the goddess had shown her favor by placing it in the sky. Not all Greek astronomers accepted the designation. In Ptolemy's Almagest, Coma Berenices is not listed as a distinct constellation. However, Ptolemy does attribute several seasonal indications (parapegma) to Conon. Conon was a friend of the mathematician Archimedes whom he probably met in Alexandria.
  Pappus states that the spiral of Archimedes was discovered by Conon. Apollonius of Perga reported that Conon worked on conic sections, and his work became the basis for Apollonius' fourth book of the Conics. Apollonius further reports that Conon sent some of his work to Thrasydaeus, but that it was incorrect. Since this work has not survived it is impossible to assess the accuracy of Apollonius' comment.
  
  wn.com/Conon_of_Samos
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  Eratosthenes
  Eratosthenes of Cyrene (Ancient Greek: Ἐρατοσθένης, IPA: [eratostʰénɛːs]; English /ɛrəˈtɒsθəniːz/; c. 276 BC – c. 195 BC) was a Greek mathematician, geographer, poet, athlete, astronomer, and music theorist.
  He was the first person to use the word "geography" and invented the discipline of geography as we understand it. He invented a system of latitude and longitude.
  He was the first person to calculate the circumference of the earth by using a measuring system using stades, or the length of stadiums during that time period (with remarkable accuracy). He was the first to calculate the tilt of the Earth's axis (also with remarkable accuracy). He may also have accurately calculated the distance from the earth to the sun and invented the leap day. He also created the first map of the world incorporating parallels and meridians within his cartographic depictions based on the available geographical knowledge of the era. In addition, Eratosthenes was the founder of scientific chronology; he endeavored to fix the dates of the chief literary and political events from the conquest of Troy.
  
  wn.com/Eratosthenes
• Euctemon
  Euctemon (unknown-fl. 432 BC) was an Athenian astronomer. He was a contemporary of Meton and worked closely with this astronomer. Little is known of his work apart from his partnership with Meton and what is mentioned by Ptolemy. With Meton, he made a series of observations of the solstices (the points at which the sun is at greatest distance from the equator) in order to determine the length of the tropical year. Geminus and Ptolemy quote him as a source on the rising and setting of the stars. The lunar crater Euctemon is named after him.
  
  
  
  wn.com/Euctemon
• Eudoxus of Cnidus
  Eudoxus of Cnidus (410 or 408 BC – 355 or 347 BC) was a Greek astronomer, mathematician, scholar and student of Plato. Since all his own works are lost, knowledge of him is obtained from secondary sources, such as Aratus's poem on astronomy. Theodosius of Bithynia's Sphaerics may be based on a work of Eudoxus.
  His name Eudoxus means "honored" or "of good repute" (in Greek Εὔδοξος, from eu "good" and doxa "opinion, belief, fame"). It is analogous to the Latin name Benedictus.
  Eudoxus's father Aeschines of Cnidus loved to watch stars at night. Eudoxus first travelled to Tarentum to study with Archytas, from whom he learned mathematics. While in Italy, Eudoxus visited Sicily, where he studied medicine with Philiston.
  Around 387 BC, at the age of 23, he traveled with the physician Theomedon, who according to Diogenes Laërtius some believed was his lover, to Athens to study with the followers of Socrates. He eventually became the pupil of Plato, with whom he studied for several months, but due to a disagreement they had a falling out. Eudoxus was quite poor and could only afford an apartment at the Piraeus. To attend Plato's lectures, he walked the seven miles (11 km) each direction, each day. Due to his poverty, his friends raised funds sufficient to send him to Heliopolis, Egypt to pursue his study of astronomy and mathematics. He lived there for 16 months. From Egypt, he then traveled north to Cyzicus, located on the south shore of the Sea of Marmara, the Propontis. He traveled south to the court of Mausolus. During his travels he gathered many students of his own.
  
  wn.com/Eudoxus_of_Cnidus
• Geminus
  Geminus of Rhodes (Greek: Γεμῖνος ὁ Ῥόδιος), was a Greek astronomer and mathematician, who flourished in the 1st century BC. An astronomy work of his, the Introduction to the Phenomena, still survives; it was intended as an introductory astronomy book for students. He also wrote a work on mathematics, of which only fragments quoted by later authors survive.
  Nothing is known about the life of Geminus. It is not even certain that he was born in Rhodes, but references to mountains on Rhodes in his Astronomical works suggests that he worked there. His dates are not known with any certainty either. A passage in his works referring to the Annus Vagus (Wandering Year) of the Egyptian calendar of 120 years before his own time, has been used to imply a date of c. 70 BC for the time of writing, which would be consistent with the idea that he may have been a pupil of Posidonius, but a date as late as 50 AD has also been suggested.
  The crater Geminus on the Moon is named after him.
  The only work of Geminus to survive is his Introduction to the Phenomena (Greek: Εἰσαγωγὴ εἰς τὰ Φαινόμενα), often just called the Isagoge. This introductory astronomy book, based on the works of earlier astronomers such as Hipparchus, was intended to teach astronomy for beginning students in the subject. In it, Geminus describes the zodiac and the motion of the Sun; the constellations; the celestial sphere; days and nights; the risings and settings of the zodiacal signs; luni-solar periods and their application to calendars; phases of the Moon; eclipses; star phases; terrestrial zones and geographical places; and the foolishness of making weather predictions by the stars.
  
  wn.com/Geminus
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  Georgian people
  The Georgians (Georgian: ქართველები, kartvelebi) are Caucasian ethnic group that have originated in Georgia, where they constitute a majority of the population. Large Georgian communities are also present throughout Russia, European Union, United States, and South America.
  The majority of Georgians are Eastern Orthodox Christian and largely adhere to the national autocephalous Georgian Orthodox Church, which originated in the 4th century. There are also Georgian Catholic and Muslim communities in Tbilisi and Adjara.
  The Georgian people went through a complex process of nation-formation and currently comprise a diverse set of geographic subgroups, each with its characteristic traditions, manners, dialect and, in the case of Mingrelians and Svans, language. The Georgian language, with its own alphabet and long written tradition going back to the 5th century, is the language of literacy and education of all Georgians living in Georgia as well as the official language of the country. Georgian, Mingrelian and Svan, together with Laz spoken by the related Laz people form the Kartvelian language family.
  
  wn.com/Georgian_people
• Heraclides Ponticus
  Heraclides Ponticus (Ancient Greek: Ἡρακλείδης ὁ Ποντικός; c. 390 BC – c. 310 BC), also known as Herakleides and Heraklides of Pontus, was a Greek philosopher and astronomer who lived and died at Heraclea Pontica, now Karadeniz Ereğli, Turkey. He is best remembered for proposing that the earth rotates on its axis, from west to east, once every 24 hours. He is also frequently hailed as the originator of the heliocentric theory, although this is doubted.
  Heraclides' father was Euthyphron, a wealthy nobleman who sent him to study at the Platonic Academy in Athens under its founder Plato and under his successor Speusippus. According to Suda, Plato, on his departure for Sicily in 361/360 BC, left the Academy in the charge of Heraclides. Heraclides was nearly elected successor to Speusippus as head of the academy in 339/338 BC, but narrowly lost to Xenocrates.
  Like the Pythagoreans Hicetas and Ecphantus, Heraclides proposed that the apparent daily motion of the stars was created by the rotation of the Earth on its axis once a day. This view contradicted the accepted Aristotelian model of the universe, which said that the earth was fixed and that the stars and planets in their respective spheres might also be fixed. Simplicius says that Heraclides proposed that the irregular movements of the planets can be explained if the earth moves while the sun stays still.
  
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• Hicetas
  Hicetas (Ancient Greek: Ἱκέτας or Ἱκέτης; ca. 400 BC – ca. 335 BC) was a Greek philosopher of the Pythagorean School. He was born in Syracuse. Like his fellow Pythagorean Ecphantus and the Academic Heraclides Ponticus, he believed that the daily movement of permanent stars was caused by the rotation of the Earth around its axis.
  
  
  
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• 
  Hipparchus
  Hipparchus/hɪˈpɑːrkəs/, or more correctly Hipparchos (Greek: Ἵππαρχος, Hipparkhos; c. 190 BC – c. 120 BC), was a Greek astronomer, geographer, and mathematician of the Hellenistic period. He is considered the founder of trigonometry.
  Hipparchus was born in Nicaea (now Iznik, Turkey), and probably died on the island of Rhodes. He is known to have been a working astronomer at least from 162 to 127 BC. Hipparchus is considered the greatest ancient astronomical observer and, by some, the greatest overall astronomer of antiquity. He was the first whose quantitative and accurate models for the motion of the Sun and Moon survive. For this he certainly made use of the observations and perhaps the mathematical techniques accumulated over centuries by the Chaldeans from Babylonia. He developed trigonometry and constructed trigonometric tables, and he solved several problems of spherical trigonometry. With his solar and lunar theories and his trigonometry, he may have been the first to develop a reliable method to predict solar eclipses. His other reputed achievements include the discovery of Earth's precession, the compilation of the first comprehensive star catalog of the western world, and possibly the invention of the astrolabe, also of the armillary sphere, which he used during the creation of much of the star catalogue. It would be three centuries before Claudius Ptolemaeus' synthesis of astronomy would supersede the work of Hipparchus; it is heavily dependent on it in many areas.
  
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• 
  Hippocrates of Chios
  Hippocrates of Chios was an ancient Greek mathematician, (geometer), and astronomer, who lived c. 470 – c. 410 BCE.
  He was born on the isle of Chios, where he originally was a merchant. After some misadventures (he was robbed by either pirates or fraudulent customs officials) he went to Athens, possibly for litigation. There he grew into a leading mathematician.
  On Chios Hippocrates may have been a pupil of the mathematician and astronomer Oenopides of Chios. In his mathematical work there probably was some Pythagorean influence too, perhaps via contacts between Chios and the neighbouring island of Samos, a center of Pythagorean thinking: Hippocrates has been described as a 'para-Pythagorean', a philosophical 'fellow traveler'. The Reductio ad absurdum argument (or proof by contradiction) has been traced to him.
  The major accomplishment of Hippocrates is that he was the first to write a systematically organized geometry textbook, called Stoicheia Elements, that is, basic theorems, or building blocks of mathematical theory). From then on, mathematicians from all over the ancient world could, at least in principle, build on a common framework of basic concepts, methods, and theorems, which stimulated the scientific progress of mathematics.
  
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• Hypsicles
  This article is about Hypsicles of Alexandria. For the historian, see Hyspicrates (historian).
  Hypsicles (Ancient Greek: Ὑψικλῆς; ca. 190 BCE – ca. 120 BCE) was an ancient Greek mathematician and astronomer known for authoring On Ascensions (Ἀναφορικός) and the spurious Book XIV of Euclid's Elements.
  Although little is known about the life of Hypsicles, it is believed that he authored the astronomical work On Ascensions (Ἀναφορικός). In this work, Hypsicles proves a number of propositions on arithmetical progressions and uses the results to calculate approximate values for the times required for the signs of the zodiac to rise above the horizon. It is thought that this is the work from which the division of the circle into 360 parts may have been adopted since it divides the day into 360 parts, a division possibly suggested by Babylonian astronomy.
  Hypsicles is more famously known for possibly writing the apocryphal Book XIV of Euclid's Elements. The spurious Book XIV may have been composed on the basis of a treatise by Apollonius. The book continues Euclid's comparison of regular solids inscribed in spheres, with the chief result being that the ratio of the surfaces of the dodecahedron and icosahedron inscribed in the same sphere is the same as the ratio of their volumes, the ratio being Failed to parse (Missing texvc executable; please see math/README to configure.): \sqrt{\tfrac{10}{3(5-\sqrt{5})}} .
  
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• 
  Isaac Casaubon
  Isaac Casaubon (18 February 1559, Geneva – 1 July 1614, London) was a classical scholar and philologist, first in France and then later in England, regarded by many of his time as the most learned in Europe.
  He was born in Geneva to two French Huguenot refugees. The family returned to France after the Edict of Saint-Germain in 1562, and settled at Crest in Dauphiné, where Arnaud Casaubon, Isaac's father, became minister of a Huguenot congregation. Until he was nineteen, Isaac had no education other than that given him by his father. Arnaud was away from home for long periods in the Calvinist camp, and the family regularly fled to the hills to hide from bands of armed Catholics who patrolled the country. It was in a cave in the mountains of Dauphiné, after the massacre of St Bartholomew, that Isaac received his first lesson in Greek, from the textbook Isocrates ad Demonicum.
  At the age of nineteen Isaac was sent to the Academy of Geneva, where he read Greek under Francis Portus a Cretan. Portus died in 1581, recommending Casaubon, then only twenty-two, as his successor. He remained at Geneva as professor of Greek until 1596. There he married twice, his second wife being Florence Etiennes, daughter of the scholar-printer Henri Estienne. At Geneva, Casaubon lacked example, encouragement and assistance and struggled against the troops of the Catholic dukes of Savoy, but became a consummate Greek and classical scholar. He spent all the money he could spare on books, including copying classics that were not then in print. Even though Henri Estienne, Theodore de Beza (rector of the university and professor of theology), and Jacques Lect (Lectius), were men of superior learning, they often had no time for Casaubon.
  
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• 
  Juba II
  Juba II (Iuba in Latin; Ιóβας (Ιóβα) or Ιουβας in Greek) or Juba II of Numidia (52/50 BC – AD 23) was a king of Numidia and then later moved to Mauretania. His first wife was Cleopatra Selene II, daughter to Greek Ptolemaic Queen Cleopatra VII of Egypt and Roman triumvir Mark Antony.
  Juba II was a prince from North Africa. He was the only child and heir to King Juba I of Numidia and his mother is unknown. In 46 BC, his father committed suicide as he was defeated by Julius Caesar (in Thapsus, North Africa) and Numidia became a Roman Province. His father was an ally to the Roman General Pompey.
  Juba II was brought to Rome by Julius Caesar and took part in Caesar’s triumphal procession. In Rome, he learned Latin and Greek, became romanized and was granted Roman citizenship. Through dedication to his studies, he is said to have become one of Rome's best educated citizens, and by age 20 he wrote one of his first works entitled Roman Archaeology. He was raised by Julius Caesar and later by his great-nephew Octavian (future Emperor Caesar Augustus). Juba II while growing up, accompanied Octavian on military campaigns, gaining valuable experience as a leader. He fought alongside Octavian in the battle of Actium in 31 BC. Juba II and Octavian became longtime friends.
  
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• 
  Kingdom of Kush
  The Kingdom of Kush or Kush was an ancient African state centered on the confluences of the Blue Nile, White Nile and River Atbara in what is now the Republic of Sudan.
  Established after the Bronze Age collapse and the disintegration of the New Kingdom of Egypt, it was centered at Napata in its early phase. After king Kashta ("the Kushite") invaded Egypt in the 8th century BC, the Kushite kings ruled as Pharaohs of the Twenty-fifth dynasty of Egypt for a century, until they were expelled by Psamtik I in 656 BC.
  During Classical Antiquity, the Kushite imperial capital was at Meroe. In early Greek geography, the Meroitic kingdom was known as Ethiopia. The Kushite kingdom with its capital at Meroe persisted until the 4th century AD, when it weakened and disintegrated due to internal rebellion. The Kushite capital was subsequently captured by the Beja Dynasty, who tried to revive the empire. The Kushite capital was eventually captured and destroyed by the kingdom of Axum. After the collapse of the Kushite empire several states emerged in its former territories, among them Nubia.
  
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• Meton of Athens
  Meton of Athens (Greek: Μέτων ὁ Ἀθηναῖος; gen.: Μέτωνος) was a Greek mathematician, astronomer, geometer, and engineer who lived in Athens in the 5th century BC. He is best known for calculations involving the eponymous 19-year Metonic cycle which he introduced in 432 BC into the lunisolar Attic calendar.
  The metonic calendar assumes that 19 solar years are equal to 235 lunar months, which is, in turn equal to 6940 days. This system was based on calculations made by Meton using his own observations of the summer solstice in 432 BC, and an observation made by Aristarchus 152 years later. Meton's observations were made in collaboration with Euctemon about whom nothing else is known.
  The Greek astronomer Callippus continued the work of Meton, proposing the Callippic cycle. The Callippic cycle is 76 years long -- approximately 4 times longer than the Metonic cycle, with one less solar day in the full cycle. Ironically, whereas the Metonic cycle overestimates the length of a solar year by 5 minutes, the Callippic cycle underestimates the length of a solar year by 11 minutes, and therefore produces results that are less accurate than those produced using the Metonic cycle.
  
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• Oenopides
  Oenopides of Chios (Greek: Οἰνοπίδης) was an ancient Greek mathematician (geometer) and astronomer, who lived around 450 BCE. He was born shortly after 500 BCE on the island of Chios, but mostly worked in Athens.
  The main accomplishment of Oenopides as an astronomer was his determination of the angle between the plane of the celestial equator, and the zodiac (the yearly path of the sun in the sky). He found this angle to be 24°. In effect this amounted to measuring the inclination of the earth axis. Oenopides's result remained the standard value for two centuries, until Eratosthenes measured it with greater precision.
  Oenopides also determined the value of the Great Year, that is, the shortest interval of time that is equal to both an integer number of years and an integer number of months. As the relative positions of the sun and moon repeat themselves after each Great Year, this offers a means to predict solar and lunar eclipses. In actual practice this is only approximately true, because the ratio of the length of the year and that of the month does not exactly match any simple mathematical fraction, and because in addition the lunar orbit varies continuously.
  
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• Philip of Opus
  Philip (or Philippus) of Opus, Greece, was a philosopher and a member of the Academy during Plato's lifetime. Philip was the editor of Plato's Laws. Philip of Opus is probably identical with the Philip of Medma (or Mende), the astronomer, who is also described as a disciple of Plato.
  According to Diogenes Laërtius, Philip of Opus was a disciple of Plato, who was responsible for transcribing Plato's Laws into twelve books, and writing the thirteenth book (the Epinomis) himself:
  Some say that Philip the Opuntian transcribed his [Plato's] work, Laws, which was written in wax [wooden tablets coated with wax]. They also say that the Epinomis [the thirteenth book of the Laws], is his.
  In the Suda, Philip is listed anonymously under the heading of philosophos ("philosopher"), his name being lost from the beginning of the entry:
  Philosopher who divided the Laws of Plato into 12 books; for he himself is said to have added the 13th. And he was a pupil of Socrates and of Plato himself, occupied with the study of the heavens. Living in the time of Philip of Macedon, he wrote the following: On the distance of the sun and moon; On gods; On time; On myths; On freedom; On anger; On reciprocation; On the Opuntian Lokrians; On pleasure; On passion; On friends and friendship; On writing; On Plato; On eclipse(s) of the moon; On the size of the sun and moon and earth; On lightning; On the planets; Arithmetic; On prolific numbers; Optics; Enoptics; Kykliaka; Means; etc.
  
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  Philolaus
  Philolaus (Greek: Φιλόλαος; c. 470–c. 385 BCE) was a Greek Pythagorean and Presocratic philosopher. He argued that all matter is composed of limiting and limitless things, and that the universe is determined by numbers. He is credited with originating the theory that the earth was not the center of the universe.
  Philolaus is variously reported as being born in either Croton,Tarentum, or Metapontum. All three places were located in southern Italy. He may have fled the second burning of the Pythagorean meeting-place around 454 BCE, after which he migrated to Greece. According to Plato's Phaedo, he was the instructor of Simmias and Cebes at Thebes, around the time the Phaedo takes place, in 399 BCE. This would make him a contemporary of Socrates, and agrees with the statement that Philolaus and Democritus were contemporaries. The various reports about his life are scattered among the writings of much later writers and are of dubious value in reconstructing his life. He apparently lived for some time at Heraclea^{[disambiguation needed ]}, where he was the pupil of Aresas, or (as Plutarch calls him) Arcesus.Diogenes Laërtius is the only authority for the claim that Plato, shortly after the death of Socrates, traveled to Italy where he met with Philolaus and Eurytus. The pupils of Philolaus and were said to have included Xenophilus, Phanto, Echecrates, Diocles and Polymnastus. As to his death, Diogenes Laërtius reports a dubious story that Philolaus was put to death at Croton on account of being suspected of wanting to be the tyrant; a story which Laërtius even took the trouble to put into verse.
  
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• 
  Pliny the Younger
  Gaius Plinius Caecilius Secundus, born Gaius Caecilius or Gaius Caecilius Cilo (61 AD – ca. 112 AD), better known as Pliny the Younger, was a lawyer, author, and magistrate of Ancient Rome. Pliny's uncle, Pliny the Elder, helped raise and educate him. They were both witnesses to the eruption of Vesuvius on 24 August 79 AD.
  Pliny is known for his hundreds of surviving letters, which are an invaluable historical source for the time period. Many are addressed to reigning emperors or to notables such as the historian, Tacitus. Pliny himself was a notable figure, serving as an imperial magistrate under Trajan (reigned AD 98–117). Pliny was considered an honest and moderate man, consistent in his pursuit of suspected Christian members according to Roman law, and rose through a series of Imperial civil and military offices, the cursus honorum (see below). He was a friend of the historian Tacitus and employed the biographer Suetonius in his staff. Pliny also came into contact with many other well-known men of the period, including the philosophers Artemidorus and Euphrates during his time in Syria.^{[citation needed]}
  
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• 
  Pompey
  Gnaeus Pompeius Magnus, also known as Pompey ( /ˈpɒmpiː/) or Pompey the Great (Classical Latin abbreviation: CN·POMPEIVS·CN·F·SEX·N·MAGNVS; September 29, 106 BC – September 29, 48 BC), was a military and political leader of the late Roman Republic. He came from a wealthy Italian provincial background, and established himself in the ranks of Roman nobility by successful leadership in several military campaigns. Sulla addressed him by the cognomen Magnus (the Great), and he was awarded three triumphs.
  Pompey joined his rival Marcus Licinius Crassus and his ally Julius Caesar in the unofficial military-political alliance known as the First Triumvirate. The first triumvirate was validated by the marriage between Julia Caesar (daughter of Julius Caesar) and Pompey. After the deaths of Julia and Crassus, Pompey sided with the optimates, the conservative and aristocratic faction of the Roman Senate.
  Pompey and Caesar contended for the leadership of the Roman state, leading to a civil war. When Pompey was defeated at the Battle of Pharsalus, he sought refuge in Egypt, where he was assassinated. His career and defeat are significant in Rome's subsequent transformation from Republic to Principate and Empire.
  
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  Posidonius
  Posidonius (Greek: Ποσειδώνιος / Poseidonios, meaning "of Poseidon") "of Apameia" (ὁ Ἀπαμεύς) or "of Rhodes" (ὁ Ῥόδιος) (ca. 135 BCE - 51 BCE), was a Greek Stoic philosopher, politician, astronomer, geographer, historian and teacher native to Apamea, Syria. He was acclaimed as the greatest polymath of his age. None of his vast body of work can be read in its entirety today, as it exists only in fragments.
  Posidonius, nicknamed "the Athlete", was born to a Greek family in Apamea, a Hellenistic city on the river Orontes in northern Syria, and probably died in Rome or Rhodes.
  Posidonius completed his higher education in Athens, where he was a student of the aged Panaetius, the head of the Stoic school.
  He settled around 95 BCE in Rhodes, a maritime state which had a reputation for scientific research, and became a citizen.
  In Rhodes, Posidonius actively took part in political life, and his high standing is apparent from the offices he held. He attained the highest public office as one of the Prytaneis (presidents, having a six months tenure) of Rhodes. He served as an ambassador to Rome in 87 - 86 BCE, during the Marian and Sullan era.
  
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  Ptolemy
  Claudius Ptolemy ( /ˈtɒləmi/; Greek: Κλαύδιος Πτολεμαῖος, Klaudios Ptolemaios; Latin: Claudius Ptolemaeus; c. AD 90 – c. AD 168), was a Greek-Roman citizen of Egypt who wrote in Greek. He was a mathematician, astronomer, geographer, astrologer, and poet of a single epigram in the Greek Anthology. He lived in Egypt under Roman rule, and is believed to have been born in the town of Ptolemais Hermiou in the Thebaid. This theory, proposed by Theodore Meliteniotes, could be correct, but it is late (ca. 1360) and unsupported. There is no reason to suppose that he ever lived anywhere else than Alexandria, where he died around AD 168.
  Ptolemy was the author of several scientific treatises, at least three of which were of continuing importance to later Islamic and European science. The first is the astronomical treatise now known as the Almagest (in Greek, Ἡ Μεγάλη Σύνταξις, "The Great Treatise", originally Μαθηματικὴ Σύνταξις, "Mathematical Treatise"). The second is the Geography, which is a thorough discussion of the geographic knowledge of the Greco-Roman world. The third is the astrological treatise known sometimes in Greek as the Apotelesmatika (Ἀποτελεσματικά), more commonly in Greek as the Tetrabiblos (Τετράβιβλος "Four books"), and in Latin as the Quadripartitum (or four books) in which he attempted to adapt horoscopic astrology to the Aristotelian natural philosophy of his day.
  
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• 
  Pytheas
  Pytheas of Massalia or (using the Latin form) Massilia (Ancient Greek Πυθέας ὁ Μασσαλιώτης) (4th century BC), was a Greek geographer and explorer from the Greek colony, Massalia (modern day Marseilles). He made a voyage of exploration to northwestern Europe at about 325 BC. He travelled around and visited a considerable part of Great Britain. Pytheas is the first person on record to describe the Midnight Sun,polar ice, Germanic and possibly Finnic tribes. He is the one who introduced the idea of distant Thule to the geographic imagination. His account of the tides is the earliest to state they are caused by the moon.
  Pliny says that Timaeus (born about 350 BC) believed Pytheas' story of the discovery of amber. Strabo says that Dicaearchus (died about 285 BC) did not trust the stories of Pytheas. That is all the information that survives concerning the date of Pytheas' voyage. Presuming that Timaeus would not have written until after he was 20 years old at about 330 BC and Dicaearchus would have needed time to write his most mature work, after 300 BC, there is no reason not to accept Tozer's window of 330 BC – 300 BC for the voyage. Some would give Timaeus an extra 5 years, bringing the voyage down to 325 BC at earliest. There is no further evidence.
  
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• Seleucus of Seleucia
  Seleucus (or Seleukos) of Seleucia (born c. 190 BC, fl. 150s BC) was a Hellenistic astronomer and philosopher. Coming from Seleucia on the Tigris, the capital of the Seleucid empire, or, alternatively, Seleukia on the Red Sea, he is best known as a proponent of heliocentrism and for his theory of the origin of tides.
  Teaching around 150 BC, he is known to have been a follower of the heliocentric theory of Aristarchus of Samos, which stated that the Earth rotated around its own axis which in turn revolved around the Sun. According to Plutarch, Seleucus was the first to demonstrate the heliocentric system through reasoning, but it is not known what arguments he used. According to Bartel Leendert van der Waerden, Seleucus may have constructed his heliocentric theory by determining the constants of a geometric model and by developing methods to compute planetary positions using this model, as Nicolaus Copernicus later did in the 16th century. He may have used trigonometric methods that were available in his time, as he was a contemporary of Hipparchus.
  
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  Strabo
  Strabo,,^{[pronunciation?]}, also written Strabon (Greek: Στράβων; 64/63 BC – ca. AD 24), was a Greek geographer, philosopher and historian.
  Strabo was born to an affluent family from Amaseia in Pontus (modern Amasya, Turkey), a city that he said was situated the approximate equivalent of 75 km from the Black Sea. His mother was Georgian. Pontus had recently fallen to the Roman Republic, and although politically he was a proponent of Roman imperialism, Strabo belonged on his mother's side to a prominent family whose members had held important positions under the resisting regime of King Mithridates VI of Pontus.
  Strabo's life was characterized by extensive travels. He journeyed to Egypt and Kush, as far west as coastal Tuscany and as far south as Ethiopia in addition to his travels in Asia Minor and time spent in Rome. Travel throughout the Mediterranean and Near East, especially for scholarly purposes, was popular during this era and was facilitated by the relative peace enjoyed throughout the reign of Augustus (27 BC – AD 14). He moved to Rome in 44 BC, and stayed there, studying and writing, until at least 31 BC. In 29 BC, on his way to Corinth (where Augustus was at the time), he visited the island of Gyaros in the Aegean Sea. Around 25 BC, he sailed up the Nile until reaching Philae, after which point there is little record of his proceedings until 17 AD.
  
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  Strato of Lampsacus
  Strato of Lampsacus (or Straton, Greek: Στράτων; c. 335-c. 269 BC) was a Peripatetic philosopher, and the third director (scholarch) of the Lyceum after the death of Theophrastus. He devoted himself especially to the study of natural science, and increased the naturalistic elements in Aristotle's thought to such an extent, that he denied the need for an active god to construct the universe, preferring to place the government of the universe in the unconscious force of nature alone.
  Strato, son of Arcesilaus or Arcesius, was born at Lampsacus between 340 and 330 BC. He might possibly have known Epicurus during his period of teaching in Lampsacus between 310 and 306. He attended Aristotle's school in Athens, after which he went to Egypt as tutor to Ptolemy, where he also taught Aristarchus of Samos. He returned to Athens after the death of Theophrastus (c. 287 BC), succeeding him as head of the Lyceum. He died sometime between 270 and 268 BC,.
  Strato devoted himself especially to the study of natural science, whence he obtained, or, as it appears from Cicero, assumed the name of Physicus (Greek: Φυσικός). Cicero, while speaking highly of his talents, blames him for neglecting the most important part of philosophy, that which concerns virtue and morals, and giving himself up to the investigation of nature. In the long list of his works, given by Diogenes Laërtius, several of the titles are upon subjects of moral philosophy, but the great majority belong to the department of physical science. None of his writings survive, his views are known only from the fragmentary reports preserved by later writers.
  
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  Thales
  Thales of Miletus ( /ˈθeɪliːz/; Greek: Θαλῆς, Thalēs; c. 624 BC – c. 546 BC) was a pre-Socratic Greek philosopher from Miletus in Asia Minor, and one of the Seven Sages of Greece. Many, most notably Aristotle, regard him as the first philosopher in the Greek tradition. According to Bertrand Russell, "Western philosophy begins with Thales." Thales attempted to explain natural phenomena without reference to mythology and was tremendously influential in this respect. Almost all of the other pre-Socratic philosophers follow him in attempting to provide an explanation of ultimate substance, change, and the existence of the world—without reference to mythology. Those philosophers were also influential, and eventually Thales' rejection of mythological explanations became an essential idea for the scientific revolution. He was also the first to define general principles and set forth hypotheses, and as a result has been dubbed the "Father of Science", though it is argued that Democritus is actually more deserving of this title.
  
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• Theon of Alexandria
  Theon (Greek: Θέων, gen.: Θέωνος; ca. 335 – ca. 405) was a Greekscholar and mathematician who lived in Alexandria, Egypt. He edited and arranged Euclid's Elements and Ptolemy's Handy Tables, as well as writing various commentaries. His daughter Hypatia also won fame as a mathematician.
  The biographical tradition (Suda) defines Theon as "the man from the Mouseion"; actually, both the Library of Alexandria and the Mouseion may have been destroyed a century before by the Emperor Aurelian during his struggle against Zenobia. Some scholars think that they were closed by the patriarch Theophilus on order of the Christian Roman emperor Theodosius I in 391. Theon was the father of the mathematician Hypatia whose murder was attributed by Socrates Scholasticus to "political jealousy" which instigated mob violence.
  Theon's most durable achievement may be his edition of Euclid's Elements, published around 364 and authoritative into the 19th century. The bulk of Theon's work, however, consisted of commentaries on important works by his Hellenistic predecessors. These included a "conferences" (Synousiai) on Euclid, and commentaries (Exegeseis) on the Handy Tables and Almagest of Ptolemy, and on the technical poet Aratus.
  
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• Theon of Smyrna
  Theon of Smyrna (Θέωνος ὁ Σμυρναῖος) (fl. 100 CE) was a Greek philosopher and mathematician, whose works were strongly influenced by the Pythagorean school of thought. His surviving On Mathematics Useful for the Understanding of Plato is an introductory survey of Greek mathematics.
  Little is known about the life of Theon of Smyrna. A bust created at his death, and dedicated by his son, was discovered at Smyrna, and art historians date it to around 135 CE. Ptolemy refers several times in his Almagest to a Theon who made observations at Alexandria, but it is uncertain whether he is referring to Theon of Smyrna. The lunar impact crater Theon Senior is named for him.
  Theon wrote several commentaries on the works of mathematicians and philosophers of the time, including works on the philosophy of Plato. Most of these works are lost. The one major survivor is his On Mathematics Useful for the Understanding of Plato. A second work concerning the order in which to study Plato's works has recently been discovered in an Arabic translation.
  
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  Tiberius
  Tiberius (Latin: Tiberius Julius Caesar Augustus; 16 November 42 BC – 16 March 37 AD), was Roman Emperor from 14 AD to 37 AD. Tiberius was by birth a Claudian, son of Tiberius Claudius Nero and Livia Drusilla. His mother divorced Nero and married Augustus in 39 BC, making him a step-son of Octavian. Tiberius would later marry Augustus' daughter Julia the Elder (from his marriage to Scribonia) and even later be adopted by Augustus, by which act he officially became a Julian, bearing the name Tiberius Julius Caesar. The subsequent emperors after Tiberius would continue this blended dynasty of both families for the next forty years; historians have named it the Julio-Claudian dynasty. In relations to the other emperors of this dynasty, Tiberius was the stepson of Augustus, great-uncle of Caligula, paternal uncle of Claudius, and great-great uncle of Nero.
  Tiberius was one of Rome's greatest generals, conquering Pannonia, Dalmatia, Raetia, and temporarily Germania; laying the foundations for the northern frontier. But he came to be remembered as a dark, reclusive, and sombre ruler who never really desired to be emperor; Pliny the Elder called him tristissimus hominum, "the gloomiest of men." After the death of Tiberius’ son Drusus Julius Caesar in 23 he became more reclusive and aloof. In 26, against better judgement, Tiberius exiled himself from Rome and left administration largely in the hands of his unscrupulous Praetorian Prefects Lucius Aelius Sejanus and Quintus Naevius Sutorius Macro. Caligula, Tiberius' grand-nephew and adopted grandson, succeeded the emperor upon his death.
  
  wn.com/Tiberius
• Timocharis
  Timocharis of Alexandria (ca. 320 BC – 260 BC) was a Greek astronomer and philosopher. Likely born in Alexandria, he was a contemporary of Euclid.^{[citation needed]}
  What little is known about Timocharis comes from citations by Ptolemy in the Almagest. These indicate that Timocharis worked in Alexandria during the 290s and 280s BCE. Ptolemy lists the declination of 18 stars as recorded by Timocharis or Aristillus in roughly the year 290 BCE. Between 295 and 272 BCE, Timocharis recorded four lunar occultations and the passage of the planet Venus across a star. These were recorded using both the Egyptian and Athenian calendars. The observed stellar passage by Venus may have occurred on October 12, 272 BCE when the planet came within 15 arcminutes of the star η Virginis.
  The observations by Timocharis are among the oldest Greek records that can be assigned a specific date. They are only exceeded by records of the summer solstice of 432 BCE, as noted by Euctemon and Meton. Timocharis worked with Aristillus in an astronomical observatory that was most likely part of the Library of Alexandria. Their equipment would have been simple, most likely consisting of gnomons, sundials and an armillary sphere. The two were contemporaries of Aristarchus of Samos, but it is unclear whether there was any association between Timocharis and Aristarchus.
  
  wn.com/Timocharis
• Tyrannion of Amisus
  Tyrannion (Greek: Τυραννίων, Latin Tyrannio; 1st century BCE) was a Greek grammarian brought to Rome as a war captive and slave.
  Tyrannion was a native of Amisus in Pontus, the son of Epicratides, or according to some accounts, of Corymbus. He was a pupil of Hestiaeus of Amisus, and was originally called Theophrastus, but received from his instructor the name of Tyrannion ("the tyrant") on account of his domineering behaviour to his fellow disciples. He afterwards studied under Dionysius the Thracian at Rhodes.
  In 72 BCE he was taken captive by Lucullus, who carried him to Rome. At the request of Lucius Licinius Murena, Tyrannion was handed over to him, upon which he emancipated him, an act with which Plutarch finds fault, as the emancipation involved a recognition of his having been a slave, which does not seem to have been the light in which Lucullus regarded him.
  At Rome, Tyrannion occupied himself in teaching. He was also employed in arranging the library of Apellicon, which Sulla brought to Rome.Cicero employed him in a similar manner, and speaks in the highest terms of the learning and ability which Tyrannion exhibited in these labours. Cicero also availed himself of his services in the instruction of his nephew Quintus.Strabo speaks of having received instruction from Tyrannion.
  
  wn.com/Tyrannion_of_Amisus

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