- published: 24 Feb 2012
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Alexandria (Arabic: الإسكندرية Al Iskandariyya, Coptic: Ⲣⲁⲕⲟⲧⲉ Rakotə, Greek: Αλεξάνδρεια Alexándria, Koine Greek: Ἀλεξάνδρεια ἡ κατ' Αἴγυπτον IPA: [ɑlɛˈksɑndɾiɑ e kɑt ˈɛʝypton] "Alexandria in Egypt", Egyptian Arabic: اسكندريه [eskendeˈrejːæ]) is the second-largest city of Egypt, with a population of 4.1 million, extending about 32 km (20 mi) along the coast of the Mediterranean Sea in the north central part of the country; it is also the largest city lying directly on the Mediterranean coast. It is Egypt's largest seaport, serving approximately 80% of Egypt's imports and exports. Alexandria is also an important tourist resort. It is home to the Bibliotheca Alexandrina (the new Library of Alexandria). It is an important industrial centre because of its natural gas and oil pipelines from Suez.
Alexandria was founded around a small pharaonic town c. 331 BC by Alexander the Great. It remained Egypt's capital for nearly a thousand years, until the Muslim conquest of Egypt in AD 641, when a new capital was founded at Fustat (Fustat was later absorbed into Cairo). Alexandria was known because of its Lighthouse of Alexandria (Pharos), one of the Seven Wonders of the Ancient World; its library (the largest library in the ancient world); and the Catacombs of Kom el Shoqafa, one of the Seven Wonders of the Middle Ages. Ongoing maritime archaeology in the harbor of Alexandria, which began in 1994, is revealing details of Alexandria both before the arrival of Alexander, when a city named Rhacotis existed there, and during the Ptolemaic dynasty.
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.