Ghiyāth al-Dīn Abū al-Fatḥ ʿUmar ibn Ibrāhīm Nīsābūrī[1][3] (18 May 1048 – 4 December 1131), commonly known as Omar Khayyam (Persian: عمر خیّام),[a] was a Persian polymath, known for his contributions to mathematics, astronomy, philosophy, and poetry.[4]:...
(wikipedia)