عنوان مقاله [English]
نویسنده [English]چکیده [English]
The extant work of the mathematician and philosopher H?is?m al-D?n ?Al? ibn Fad?l-All?h al-S?l?r is limited to some small mathematical treatises and a book named J?mi? Qaw?n?n ?Ilm al-Hay?a (Compendium of the Laws of the Science of Astronomy). The latter has been used by Nas??r al-D?n al-T??s? in writing his Kashf al-Qin?? ?an Asr?r al-Shakl al-Qat?t??? (Removing the Veils of the Secrets of Sector Figure). Nevertheless, he is rarely mentioned in ancient sources and what we find about him in modern scholarship is largely false and contradictory. Some place him at the beginning of the sixth century AH, others at the middle of the seventh century AH. Still others, while accepting that the Compendium of the Laws of the Science of Astronomy has been written about the middle of the sixth century AH, believe that it belongs to another author, because they consider H?is?m al-D?n as an author of the seventh century AH.