Shams al-Dën Muḥammad ibn Ashraf al-Ḥusaynë al-Samarqandë (Persian: ôàó çÃÂïÃÂàóàñÃÂÃÂïÃÂ; ) was a 13th century Islamic theologian, astronomer and mathematician from Samarkand, now in Uzbekistan.
Little is known of al-Samarqandi's life, who composed his most important works during the 13th and 14th centuries. He wrote works on theology, logic, philosophy, mathematics and astronomy which are important in their own right, but also provide information about the works of other astronomers. His treatise, , is a discussion of dialectic reasoning as used by the ancient Greeks. He wrote Synopsis of Astronomy, and produced a star catalogue for the year 1276âÂÂ1277.
Al-Samarqandi wrote a 20-page work which discussed 35 of Euclid's propositions. In his preparation of the work, al-Samarqandi consulted the works of other Muslim mathematicians such as Ibn al-Haytham, Omar Khayyam, Al-AbbÃÂs ibn Said al-Jawharë, Nasir al-Din al-Tusi, and Athër al-Dën al-Abharë.