Ya'ish ibn Ibrahim al-Umawi

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, Syria) was a 14th-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).

gollark: It's a conlang.

gollark: https://mw.lojban.org/papri/Lojban

gollark: https://en.wikipedia.org/wiki/Lojban

gollark: Solution: require everyone to use Lojban, which is machine-parseable.

gollark: Probably not very, English is hard.

References

Gibb, Hamilton Alexander Rosskeen; Kramers, Johannes Hendrik; Lewis, Bernard; Pellat, Charles; Schacht, Joseph (1970). The Encyclopaedia of Islam. Brill.

Bibliography

Saidan, A. S. (1970). "Al-Umawī, Abū 'Abdallāh Ya'īsh Ibn ibrāHīm Ibn Yūsuf Ibn Simāk Al-Andalusī". Dictionary of Scientific Biography. New York: Charles Scribner's Sons. ISBN 0-684-10114-9.
Ahmad Salim Saidan (ed.), Yaish ibn Ibrahim al-Umawi, On arithmetical rules and procedures (Aleppo, 1981).

External links

O'Connor, John J.; Robertson, Edmund F., "Ya'ish ibn Ibrahim al-Umawi", MacTutor History of Mathematics archive, University of St Andrews.

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[1] Gibb, Hamilton Alexander Rosskeen; Kramers, Johannes Hendrik; Lewis, Bernard; Pellat, Charles; Schacht, Joseph (1970). The Encyclopaedia of Islam. Brill.