Show Summary Details

Page of

Printed from Grove Music Online. Grove is a registered trademark. Under the terms of the licence agreement, an individual user may print out a single article for personal use (for details see Privacy Policy).

date: 06 August 2020

Gersonides [Levi ben Gershom (Gershon, Gerson); Leo Hebraeus; Magister Leon de Bagnols; RaLBaG]locked

  • C. Matthew Balensuela


[Levi ben Gershom(GershonGerson)Leo HebraeusMagister Leon de BagnolsRaLBaG]

(b Bagnols, 1288; d Provence, 1344). French mathematician. He lived in Provence, primarily in Orange, north of Avignon, an area that offered protection to Jews and a haven from King Philip the Fair’s expulsion of Jews in 1306. His works were known in both Jewish and Christian circles. He wrote in Hebrew, and his writings were translated into Latin; as a result he is known by several different names. He is referred to as Levi ben Gershom or RaLBaG (an acronym of Rabbi Levi ben Gershom) in Hebrew texts, and as Gersonides, Gerson, and several other variants in Latin sources. His mathematical works include a commentary on Euclid and a treatise on trigonometry. He was also an astronomer, biblical exegete, and neo-Aristotelian philosopher. In addition to commentaries on Aristotle and Ibn Rushd, his major work was Sefer milhamot Adonai (‘The Wars of the Lord’, 1317–29), which treats the central philosophical debates of his time, such as the immortality of the soul and the creation of the world....

You do not currently have access to this article


Please login to access the full content.


Please subscribe to access the full content.

H. Riemann: Geschichte der Musiktheorie im IX.-XIX. Jahrhundert (Berlin, 2/1921/R; Eng. trans. of pts i-ii, 1962/R, and pt iii, 1977)
Paris, Bibliothèque Nationale de France
Nuova rivista musicale italiana
Basle, Universität Basel, Öffentliche Bibliothek, Musikabteilung
Journal of the American Musicological Society
Die Musik in Geschichte und Gegenwart
The New Grove Dictionary of Music and Musicians