Ya'ish ibn Ibrahim al-Umawi explained
Abū ʿAbdallāh Yaʿīsh ibn Ibrāhīm ibn Yūsuf ibn Simāk al-Andalusī al-Umawī (1400? in Al-Andalus – 1489 in Damascus, Syria) was a 15th-century Spanish-Arab[1] mathematician.
Works
- Marasim al-intisab fi'ilm al-hisab ("On arithmetical rules and procedures"), first date written in 1373 and hence the birth date above is controversial.
- Raf'al-ishkal fi ma'rifat al-ashkal (a work on mensuration).
Bibliography
Notes and References
- Book: Gibb. Hamilton Alexander Rosskeen. Kramers. Johannes Hendrik. Lewis. Bernard. Pellat. Charles. Schacht. Joseph. The Encyclopaedia of Islam. 1970. Brill. en.