The unedited full-text of the 1906 Jewish Encyclopedia
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G. Sacerdote, Ph.D.

Berlin, Germany.

ABRAHAM BAR ḤIYYA HA-NASI – As a Mathematician and Astronomer: A celebrated Jewish mathematician, astronomer, and philosopher of the twelfth century. He lived in Barcelona in 1136. According to S. D. Luzzatto, there exists a manuscript, dated April 10,...