Born on 1099 Died on 1100
Al-Idrisi was a noteworthy and original geographer. He used in a creative way the system of cylindrical projection of the Earth's surface, which was to be claimed some centuries later, in 1569, by the Flemish Gerard Mercator. Al-Idrisi's other merit, according to Udovitch is the extensive informatio...
Born on 1050 Died on 1110
Abu Hatim al-Muzaffar b. Isma’il al-Isfizari was a mathematician and mechanician who flourished in Khurasan (north-east Iran).
Born on 718 Died on 791
Al Khalil Ibn Ahmed (b.Baghdad 718 CE), a philologist, categorised the metres of classical Arabic poetry into sixteen distinct types (Taf‘ila) of eight-word units. A systemof scanning was used, where “1” indicates a sound and “0“ indicates silence (i.e. no vowel). The verbalmetre is a coded order re...