Abraham bar Ḥiyya ha-Nasi (also Abraham ben Chija) (Hebrew: אברהם בר חייא הנשיא Abraham son of [Rabbi] Hiyya "the Prince") ("Abraham ben Hiyya alBargeloni") ("Abraham Judaeus", "Abraham ben Chiya albargeloni Ha'Nasi" ) ("Rabeinu Avraham Bar Chiya HaNasi" ) ("R' Avraham ben Chiya Hanasi mi'Barcelona" ) (Avraham ben Chiya Hanasi medinat Bartselona) (Abraham ben Chiva ) (Abraham Ben Chaja ) (Abraham ben Chaja ben Rabbi Chiya, or Chaja or Haija) (Ra...
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Abraham bar Ḥiyya ha-Nasi (also Abraham ben Chija) (Hebrew: אברהם בר חייא הנשיא Abraham son of [Rabbi] Hiyya "the Prince") ("Abraham ben Hiyya alBargeloni") ("Abraham Judaeus", "Abraham ben Chiya albargeloni Ha'Nasi" ) ("Rabeinu Avraham Bar Chiya HaNasi" ) ("R' Avraham ben Chiya Hanasi mi'Barcelona" ) (Avraham ben Chiya Hanasi medinat Bartselona) (Abraham ben Chiva ) (Abraham Ben Chaja ) (Abraham ben Chaja ben Rabbi Chiya, or Chaja or Haija) (Rabbi Abrahamo Hispano filio Rabbi Haijae ) (1065 Province of Soria, Spain – 1145 Narbonne, France) was a Spanish Jewish mathematician, astronomer and philosopher, also known as Savasorda (from the Arabic صاحب الشرطة Sâhib ash-Shurta "Chief of the Guard"). He was born in Province of Soria, lived in Barcelona and scholars suspect he traveled to Narbonne where he is thought to have died.
Abraham bar Hiyya, great-grandson of Hezekiah Gaon is remembered in the world of mathematics for his role in the dissemination of the quadratic equation....
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