Abu'l-Hasan al-Uqlidisi

Abu'l Hasan Ahmad ibn Ibrahim Al-Uqlidisi (Arabic: أبو الحسن أحمد بن ابراهيم الإقليدسي‎) was a Muslim Arab mathematician, who was active in Damascus and Baghdad. He wrote the earliest surviving book on the positional use of the Arabic numerals, Kitab al-Fusul fi al-Hisab al-Hindi (The Arithmetics of Al-Uqlidisi) around 952. It is especially notable for its treatment of decimal fractions, and that it showed how to carry out calculations without deletions. A. S. Saidan who studied al-Uqlidisi's mathematical treatise in detail wrote:

Abu'l-Hasan al-Uqlidisi

Abu'l Hasan Ahmad ibn Ibrahim Al-Uqlidisi (Arabic: أبو الحسن أحمد بن ابراهيم الإقليدسي‎) was a Muslim Arab mathematician, who was active in Damascus and Baghdad. He wrote the earliest surviving book on the positional use of the Arabic numerals, Kitab al-Fusul fi al-Hisab al-Hindi (The Arithmetics of Al-Uqlidisi) around 952. It is especially notable for its treatment of decimal fractions, and that it showed how to carry out calculations without deletions. A. S. Saidan who studied al-Uqlidisi's mathematical treatise in detail wrote: