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Abu al-Fadl ben Yosef Hasdai (Arabic: أبوالفضل حصداي ابن يوسف ابن حصداي, ʾAbūu al-Faḍl Ḥaṣdāī ibn Yūṣuf ibn Ḥaṣdāī Hebrew: חַסְדַּאי בֶּן יוֹסֵף, Ḥasdai ben Yosef) was an eleventh-century philosopher, poet, mathematician, physician, and political figure in Zaragoza, then under the Taifa of Zaragoza.

He was the son of the poet Joseph ibn Ḥasdai, who had fled from Córdoba in 1013, and the grandson of Ḥasdai ibn Ishaq. In 1066 he was appointed vizier in the Hudid court of Zaragoza, a position he held until Yusuf al-Mu'taman ibn Hud ascended the throne in 1081.

References

1. Sela, Shlomo (2003). Abraham ibn Ezra and the Rise of Medieval Hebrew Science. Leiden: Brill. p. 6. ISBN 978-90-04-12973-3.
2.  Gottheil, Richard; Kayserling, Meyer; Jacobs, Joseph (1901–1906). "Spain". In Singer, Isidore; et al. (eds.). The Jewish Encyclopedia. New York: Funk & Wagnalls.

•  This article incorporates text from a publication now in the public domain: Kohler, Kaufmann; Broydé, Isaac (1901–1906). "Ḥasdai (Ḥisdai), Abu al-Faḍl ben Joseph ibn". In Singer, Isidore; et al. (eds.). The Jewish Encyclopedia. New York: Funk & Wagnalls.

• 11th-century Sephardi Jews
• 11th-century mathematicians
• Converts to Islam from Judaism
• Medieval Jewish philosophers
• 11th-century Jews from al-Andalus
• 11th-century writers from al-Andalus
• Medieval Jewish poets
• Medieval Jewish scientists
• Mathematicians from al-Andalus
• People from Zaragoza
• Jewish viziers