Abraham bar Ḥiyya ha-Nasi (Hebrew: אברהם בר חייא הנשיא Abraham son of [Rabbi] Hiyya "the Prince") (1070 Barcelona, Spain – 1136 Provence, 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 lived in Barcelona.
Abraham bar Hiyya, great-grandson of Hezekiah Gaon is remembered in the world of mathematics for his role in the disseminati...
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Abraham bar Ḥiyya ha-Nasi (Hebrew: אברהם בר חייא הנשיא Abraham son of [Rabbi] Hiyya "the Prince") (1070 Barcelona, Spain – 1136 Provence, 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 lived in Barcelona.
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. Bar Hiyya wrote several scientific works in the fields of astronomy, mathematics, land surveying and calendar calculations.
He also wrote two religious works in the field of Judaism and the Hebrew Bible: Hegyon ha-Nefesh ("Contemplation of [the] Soul") on repentance and Megillat ha-Megalleh on the redemption of the Jewish people. Even these religious works contain scientific and philosophical speculation. His Megillat ha-Megalleh ("Scroll of the Revealer") was also astrological in nature. It claimed to forecast...
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