Abu Bakr Muhammad Ibn ‘Abd al-Bāqī al-Baghdadi al-Ansārī al-Kaabī (1050-1141) (

Arabic Arabic (, ' ; , ' or ) is a Semitic language spoken primarily across the Arab world.Semitic languages: an international handbook / edited by Stefan Weninger; in collaboration with Geoffrey Khan, Michael P. Streck, Janet C. E.Watson; Walter ...

: محمد بن عبد الباقي البغدادي) also known as Qadi al-Maristan, was an

Arab The Arabs (singular: Arab; singular ar, عَرَبِيٌّ, DIN 31635: , , plural ar, عَرَب, DIN 31635: , Arabic pronunciation: ), also known as the Arab people, are an ethnic group mainly inhabiting the Arab world in Western Asia, ...

jurist and

mathematician A mathematician is someone who uses an extensive knowledge of mathematics in their work, typically to solve mathematical problems. Mathematicians are concerned with numbers, data, quantity, structure, space, models, and change. History On ...

. He was the author of a commentary on the tenth book of

Euclid Euclid (; grc-gre, Εὐκλείδης; BC) was an ancient Greek mathematician active as a geometer and logician. Considered the "father of geometry", he is chiefly known for the '' Elements'' treatise, which established the foundations of ...

's Elements, which was translated by

Gerard of Cremona Gerard of Cremona (Latin: ''Gerardus Cremonensis''; c. 1114 – 1187) was an Italian translator of scientific books from Arabic into Latin. He worked in Toledo, Kingdom of Castile and obtained the Arabic books in the libraries at Toledo. Some of ...

as ''Liber judei super decimum Euclidis''. The work was popular in Europe with several Latin manuscripts still extant. Other works include: * ''Jadawil al-Jayb al-Mahlul al-Daqiqa'' (detailed tables of sines for each minute), * ''Risala fi Taqrib Usul al-Hisab fi' al-Jabr wa-‘l-Muqabala'' (Treatise on approximation of principles of arithmetic) * ''Kitab al-Tabaqat fi Sharh al-Misaha'' (book on measurements)

Machometus Bagdedinus

Muhammad Ibn ‘Abd al-Bāqī has been identified by modern scholars with the Latin name, Machometus Bagdedinus, although this identification is sometimes disputed. Machometus Bagdedinus, was an Arab author whose translated work, ''De superficierum divisionibus liber'', contains the only trace of

's work "On Divisions of Figures" in the Latin tradition. The work was later printed in 1570, edited by John Dee and

Federico Commandino Federico Commandino (1509 – 5 September 1575) was an Italian humanist and mathematician. Born in Urbino, he studied at Padua and at Ferrara, where he received his doctorate in medicine. He was most famous for his central role as translator o ...

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External links

* {{DEFAULTSORT:Muhammad Al-Baghdadi 1050 births 1141 deaths 11th-century Arabs 12th-century Arabs 11th-century mathematicians Mathematicians from the Abbasid Caliphate