## Logical Necessities in Mixed Equations: 'Abd Al-Hamîd Ibn Turk and the Algebra of his Time

The famed Muslim scholar Al-Kwarazmi has long been known as the father of Algebra. In this article, Aydin Sayili presents an alternative view of the inception and development of Algebra in the works of of 'Abd al-Hamid Ibn Turk, a well known mathematician of the early 9th century, probably contemporary to al-Khwarizmi. The author raises an outstanding hypothesis according to which Ibn Turk may have written the first Arabic book on algebra in Islam, and not Muhammad ibn Mûsâ al-Khwârazmi.

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