

bifolia) A piece of paper folded in half to produce two leaves (i.e., four pages). Basmalah The formula bi-ism Allah al-raman al-rahim "In the name of God, the Beneficent, the Merciful." This formula almost always begins a treatise, and it is sometimes placed within the illuminated opening of a treatise. In some regions of upper Mesopotamia and the Yemen their rule continued to the end of the 15th century. From 1169 (564 H) to 1250 (648 H) the Ayyubids ruled Egypt and Syria.

Ayyubid The name of a dynasty founded by Salah al-Din ibn Ayyub, known to Europe as Saladin.

The letter-numerals for numbers 1 through 50 were the same throughout the Islamic lands, but there were differences between the Western areas and the Eastern when it came to assigning letters to the remaining values, as can be seen in the following table:Īristotelian Ideas attributable to the Greek philosopher and scholar Aristotle ( d. The symbol for zero was derived from Greek astronomical and mathematical manuscripts where a symbol was often used as an abbreviation for the Greek word ouden, meaning "nothing". The name abjad comes from the first four letters in the sequence to which values 1, 2, 3, and 4 were assigned, that is, letters, alif, ba', jim, and dal. Thus the number 652 would be represented by the letters kha',, nun, and ba', no matter in what order the letters were arranged. It is not a place-notational system, for their value does not depend upon their position relative to one another. They could thus be used in various combinations to represent any number from 1 to 1999. Abjad Abjad letter-numerals are the letters of the Arabic alphabet given numerical values.
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273-274 and Clifford Edmund Bosworth, The New Islamic Dynasties: A chronological and genealogical manual (Edinburgh: Edinburgh University Press, 1996), pp. Bowersock, Peter Brown, and Oleg Graver (Cambridge, Mass.: Harvard University Press, 1999), pp. 15-23 article "Abbasids" by Nassar Rabat in Late Antiquity: A guide to the Postclassical World, ed. The ‘Abbasid court patronized the translation into Arabic of Greek, Persian, and Sanskrit texts, including many medical ones. In the 9th and 10th centuries Baghdad became the largest and wealthiest city in the world outside of China. 754-775) can be considered the architect of the medieval Islamic empire, and he moved the administrative capital from Damascus, in Syria, to Baghdad on the Tigris River in Iraq. The second ‘Abbasid caliph, al-Mansur (reg. A dynasty of Caliphs ruling from 750 (132 H) to 1258 (656H).
