Immanuel Bonfils

Who is Immanuel Bonfils?

Immanuel ben Jacob Bonfils was a Jewish mathematician and astronomer. He lived in Orange, later in Tarascon.

He studied astronomy and mathematics from works of Levi бен Gershom and Al-Battani. In 1365, he published the astronomical tables «Six wings», including, besides common astronomical information, the data for the Jewish calendar calculations.

Bonfils was the first European mathematician who has published the general theory of decimal fractions. However before works of Simon Stevin this theory hasn't received distribution. He had translated a number of books from Latin to Hebrew. Some of his works had been translated to Latin and to Greek.