Abraham bar Hiyya (1070–1136)
Born 1070 CE, died 1136 CE.
Abraham bar Ḥiyya ha-Nasi (Hebrew: ר׳ אַבְרָהָם בַּר חִיָּיא הַנָשִׂיא; c. 1070 – 1136 or 1145), also known as Abraham Savasorda, Abraham Albargeloni, and Abraham Judaeus, was a Catalan Jewish mathematician, astronomer and philosopher who resided in Barcelona, then in the County of Barcelona, today Spain. Bar Ḥiyya was active in translating the works of Islamic science into Latin and was likely the earliest to introduce algebra from the Muslim world into Christian Europe. He also wrote several original works on mathematics, astronomy, Jewish philosophy, chronology, and surveying. His most influential work is his Ḥibbur ha-Meshiḥah ve-ha-Tishboret, translated in 1145 into Latin as Liber embadorum. A Hebrew treatise on practical geometry and algebra, the book contains the first known complete solution of the quadratic equation x 2 − a x + b = c {\displaystyle x^{2}-ax+b=c} , and influenced the work of Fibonacci.
Text from the Wikipedia article Abraham_bar_Hiyya, licensed CC BY-SA 4.0.