Abū ʿAbdallāh Yaʿīsh ibn Ibrāhīm ibn Yūsuf ibn Simāk al-Andalusī al-Umawī (Arabic: يعيش بن إبراهيم بن يوسف بن سماك الأموي الأندلسي) (1400?
in Al-Andalus – 1489 in Damascus, Mamluk Sultanate) was a 15th-century Spanish-Arab[1] mathematician.
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