Born : 29 or 30 December 1256, Marrakech, Morocco
Died : 31 July 1321
Main interests : Mathematics, Astronomy.
Ibn al‐Bannāʾ al‐Marrākushī, also known as
Abu'l-Abbas Ahmad ibn Muhammad ibn Uthman (Arabic: ابن
البنّاء) (29 December 1256 – c. 1321), was
a Moroccan-berber mathematician, astronomer, Islamic scholar, Sufi,
and a one-time astrologer.
Biography
Ibn al-Banna' (lit. the son of the architect) was born in Marrakesh in
1256; he is named al‐Marrākushī after that city.[2] Having learned basic
mathematical and geometrical skills, he translated Euclid's Elements into
Arabic.
Works
Ibn al-Banna' wrote between 51 and 74 treatises, encompassing such varied
topics as Algebra, Astronomy, Linguistics, Rhetoric, and Logic. One of his
works, called Talkhīṣ ʿamal al-ḥisāb (Arabic: تلخيص
أعمال الحساب) (Summary of arithmetical
operations), includes topics such as fractions, sums of squares and cubes etc.
Another, called Tanbīh al-Albāb, covers topics related to:
1. calculations regarding the drop in irrigation canal levels,
2. arithmetical explanation of the Muslim laws of inheritance
3. determination of the hour of the Asr prayer,
4. explanation of frauds linked to instruments of measurement,
5. enumeration of delayed prayers which have to be said in a precise order,
and
6. calculation of legal tax in the case of a delayed payment
He also wrote Rafʿ al-Ḥijāb (Lifting the Veil) which covered topics such as
computing square roots of a number and the theory of continued fractions. This
was the first mathematical work since Brahmagupta to use an algebraic notation,
further developed by Abū al-Hasan ibn Alī al-Qalasādī two centuries later.
Legacy
The crater Al-Marrakushi on the Moon is named after him.
Sumber
Labels:
Mathematician
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