AHVĀZĪ, a 4th/10th century mathematician. He was a contemporary of Abū Jaʿfar Ḵāzen (fl. ca. 950-970), whom he mentions. There is no convincing reason to accept his identification by Suter and Sezgin with Abu’l-Ḥosayn Aḥmad b. Ḥosayn Ahvāzī Kāteb who is mentioned by Bīrūnī (Āṯār al-bāqīa, pp. 289, 293; Chronology, pp. 284, 288-89) as an expert on the ecclesiastical hierarchy and the ceremony of christening in Constantinople. He is the author of Šarḥ al-maqālat al-ʿāšera men ketāb Oqlīdes (“Commentary on the tenth book of Euclid”) in eight sections, which is preserved in a number of manuscripts. One of these also contains a Resāla fi’l-mīzān (“Epistle on the balance”) attributed to him.


Sezgin, GAS V, pp. 312-13.

Suter, Mathematiker, pp. 57-58, no. 123.


(D. Pingree)

Originally Published: December 15, 1984

Last Updated: July 29, 2011

This article is available in print.
Vol. I, Fasc. 7, p. 691

Cite this entry:

David Pingree, “AHVĀZĪ,” Encyclopædia Iranica, I/7, p. 691; an updated version is available online at http://www.iranicaonline.org/articles/ahvazi-a-4th-10th-century-mathematician (accessed on 28 March 2014).