, renowned Persian scholar and poet of the Sald̲j̲ūḳ period (ca. 439-517/1048-1123).

1. Biography

Al-Imām Abū Ḥafṣ ʿUmar b. Ibrāhīm al-Ḵh̲ayyāmī is thus named in the Mīzān al-ḥikma which ʿAbd al-Raḥmān al-Ḵh̲āzinī composed in 515/1121, often mentioning Ḵh̲ayyām for his scientific works. Abū Ḥafṣ is a kunya customarily associated with the name ʿUmar, and al-Ḵh̲ayyāmī is the form which would be expected in an Arabic work; it would be pointless to speculate on the origin of this name, as to whether, for example, this was a man belonging to a f…