athir al-din abhari is one of the most outstanding logicians of the islamic period, even though he is less known to contemporary scholars than other logicians. this article, by presenting an edition of al-risalat al-zahirah (the shining treatise), not only makes available for the first time in print an important text in the field of logic, but also surveys some of abhari's logical thought ...

the treatise entitled “arithmetic in astronomy”, which is edited and commented upon in this paper, is part of an old manuscript collection preserved in the national library of bosnia and herzegovina. at the end of this treatise there are some phrases in arabic which show that the treatise was originally part of a persian book written by ʿalī al-qūshchī. this manuscript is, in fact, an abridged ...

manuscript no. 3447 in national library of tabriz is a persian treatise which covers arithmetic, geometry, algebra, hayʾa and the topic of “masses and distances. the redaction of the text has been finished in 670ah/1271ad but we don’t know anything about the author of the treatise. in the two first chapters of his treatise (on arithmetic) the unknown author draws upon ʿabd al-qāhir al-baghdādī’...

Treatise No. I Treatise No. II Treatise No. III Treatise No. IV Treatise No. V Treatise No. VI Treatise No. VII Treatise No. VIII Treatise No. IX Treatise No. X Treatise No. XI embraces Thuja Occidentalis. embraces Cactus Grandiflorus. embraces Pilocarpus (Jaborandi). embraces Veratrum Viride. embraces Chionanthus Virginica. l embraces Asepsin and Asepsin Soap. embraces Collinsonia Canadensis. ...

In this paper, we study Ghiyath al-Din Jamshid al-Kashi's (1380-1429 A.D.) main mathematical achievements. We discuss his al-Risala al-muhitiyya ("The Treatise on the Circumference"), Risala al-watar wa'l-jaib ("The Treatise on the Chord and Sine"), and Miftah al-hisab ("The Key of Arithmetic"). In particular, we look at al-Kashi's fundamental theorem, his calcula...

athir al-din al-abhari has a treatise bibliographies have called “thamani ‘ashra mas’ala fi al-kalam” (i.e., 18 problems in theology) or “al-mas’il” (i.e. the problems), but our findings show that its real name is “tahrir al-dalail fi taqrir al-masa’il” (i.e. the introduction of arguments for the establishment of the problems). the treatise, which is presumably his only writing in kalam, contai...

this article is devoted to kamāl al-dīn al-fārsī’s (d. 1319) additions to some remarks contained in book xiii of al-ṭūsī’s taḥrīr uṣūl al-handasa, concerning the construction of a semi-regular polyhedron inscribed into a sphere using the movement as a way for the construction. this treatise is one treatise among ten found in a codex preserved at the bibliothèque nationale de tunis.