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Bible Encyclopedias

The 1901 Jewish Encyclopedia

Isaac Ben Moses Eli (ha-Sefardi)

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Spanish mathematician of the fifteenth century born at Oriola, Aragon. According to Steinschneider, he may have been one of the Spanish exiles of 1492 he probably went to Constantinople. His brother was possibly the Judah ben Moses Eli of Lisbon mentioned in the Paris manuscript No. 292. He wrote a mathematical work entitled (according to Steinschneider) "Meleket ha-Mispar," probably the first two words of the book (Neubauer, "Cat. Bodl. Hebr. MSS." Nos. 1297, 2,2065, 11 Paris MSS. Nos. 1029, 4,1095 Leyden MS. No. 66, 3 on the MS. at the Sofia Rabbinical Seminary see Grü nwald in Rahmer's "Jü d. Litt.-Blatt." 1894, p. 176). The book is divided into three parts: (1) a theory of numbers, dealing with the first four rules and the extraction of square roots (2) proportion, etc. (3) elementary geometry. The book is an introduction to Euclid, and begins with a definition of the science of figures. The Sofia manuscript was copied for Mordecai Kumtiano (about 1460).

Bibliography : Steinschneider, Bibliotheca Mathematica , 1901, p. 74 idem, Jewish Literature , p. 192.S. M. Sc.

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Bibliography Information
Singer, Isidore, Ph.D, Projector and Managing Editor. Entry for 'Isaac Ben Moses Eli (ha-Sefardi)'. 1901 The Jewish Encyclopedia. 1901.

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