Mathematician:Levi ben Gershon/Mistake

Source Work

2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.):

Levi ben Gerson (1288-1344)

Mistake

Jewish mathematician and astronomer who produced in his Sefer ha mispar (1321, Book of Number) one of the first texts to establish simple rules for calculating permutations and combinations ...

Correction

That book was in fact by Abraham ibn Ezra.

It is suspected that what is in fact meant here is Ma'aseh Hoshev (that is, "Work of Calculation").

Sources

• 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): Levi ben Gerson (1288-1344)