al-Mulakhkhaṣ fī al-hay’a al-basīṭa (Epitome of plain theoretical astronomywas the subject of an enormous number of extant commentaries and supercommentaries. These commentaries (many written in Persian as well as Arabic) were meant to be studied along with the Mulakhkhaṣ and used as supplements for more advanced teaching texts. It is composed of an introduction and 2 sections. The introduction is an explanation of the divisions of the bodies in general; section one is divided into 5 parts and is an explanation of the celestial orbs and what pertains to them; and section two is divided into 3 parts, and is an explanation of the Earth and what pertains to it. ; Istanbul MS Lâleli 2141 contains a copy dated 644 H./1246–1247. [S. Ragep]