ABU’L-ḤASAN ŠAMSĪ HERAVĪ, medieval mathematician; Seǰzī (late 4th/10th century) quotes some of his propositions regarding the trisection of an angle; and these are all that survive of his work (F. Woepcke, L’algèbre d’Omar Alkhayyāmī, Paris, 1851, pp. 118-19, 122). It was suggested (Suter, Mathematiker, p. 228) that he may be the ʿAbdallāh b. Moḥammad Heravī who wrote a Resāla fī anna ketāb Oqlīdes fi’l-oṣūl mabnī ʿala’l-taʾlīf al-manṭeqī fī moqaddemātehe (“Epistle on the fact that Euclid’s book The Elements rests upon logical composition in its premises”). The suggestion may be valid if the latter author is not the mystic ʿAbdallāh Anṣārī (fl. second half of the 5th/11th cent.).
Bibliography: Given in the text.
Originally Published: December 15, 1983
Last Updated: July 21, 2011
This article is available in print.
Vol. I, Fasc. 3, p. 305
David Pingree, “ABU’L-ḤASAN HERAVĪ,” Encyclopædia Iranica, I/3, p. 305; an updated version is available online at http://www.iranicaonline.org/articles/abul-hasan-samsi-heravi (accessed on 31 January 2014).