- published: 17 May 2015
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Cairo ( /ˈkaɪroʊ/ KYE-roh; Arabic: القاهرة al-Qāhira, literally "The Vanquisher" or "The Conqueror"), is the capital of Egypt and the largest city in the Arab world and Africa, and the 16th largest metropolitan area in the world. Located near the Nile Delta, it was founded in the year 969 A.D. making it 1,043 years old. Nicknamed "The City of a Thousand Minarets" for its preponderance of Islamic architecture, Cairo has long been a centre of the region's political and cultural life. Cairo was founded by the Fatimid dynasty in the 10th century AD.; but the land composing the present-day city was the site of national capitals whose remnants remain visible in parts of Old Cairo. Cairo is also associated with Ancient Egypt due to its proximity to the ancient cities of Memphis, Giza and Fustat which are nearby to the Great Sphinx and the pyramids of Giza.
Egyptians today often refer to Cairo as Maṣr (Arabic: مصر), the Arabic pronunciation of the name for Egypt itself, emphasizing the city's continued role in Egyptian influence. Cairo has the oldest and largest film and music industries in the Arab World, as well as the world's second-oldest institution of higher learning, al-Azhar University. Many international media, businesses, and organizations have regional headquarters in the city, and the Arab League has had its headquarters in Cairo for most of its existence.
1 (one; /ˈwʌn/ or UK /ˈwɒn/) is a number, a numeral, and the name of the glyph representing that number. It represents a single entity, the unit of counting or measurement. For example, a line segment of "unit length" is a line segment of length 1.
One, sometimes referred to as unity, is the integer before two and after zero. One is the first non-zero number in the natural numbers as well as the first odd number in the natural numbers.
Any number multiplied by one is the number, as one is the identity for multiplication. As a result, one is its own factorial, its own square, its own cube, and so on. One is also the empty product, as any number multiplied by one is itself, which produces the same result as multiplying by no numbers at all.
The glyph used today in the Western world to represent the number 1, a vertical line, often with a serif at the top and sometimes a short horizontal line at the bottom, traces its roots back to the Indians, who wrote 1 as a horizontal line, much like the Chinese character 一. The Gupta wrote it as a curved line, and the Nagari sometimes added a small circle on the left (rotated a quarter turn to the right, this 9-look-alike became the present day numeral 1 in the Gujarati and Punjabi scripts). The Nepali also rotated it to the right but kept the circle small. This eventually became the top serif in the modern numeral, but the occasional short horizontal line at the bottom probably originates from similarity with the Roman numeral Failed to parse (Missing texvc executable; please see math/README to configure.): \mathrm{I} . In some European countries (e.g., Germany), the little serif at the top is sometimes extended into a long upstroke, sometimes as long as the vertical line, which can lead to confusion with the glyph for seven in other countries. Where the 1 is written with a long upstroke, the number 7 has a horizontal stroke through the vertical line.