Jabir bin Aflah
Abū Muḥammad Jabir ibn Aflah (    , Latin   ; 1100–1150) Balarabe neMasanin ilmin taurari ne kuma masanicin lissafi daga Seville, wanda ya yi aiki a karni na 12 al-Andalus. Aikinsa Iṣlāḥ al-Majisṭi (Gyara Almagest ) ya rinjayi masana ilimin taurari na Musulunci, Yahudawa, da Kirista.

Aslāḥ al-Majisṭi (Corection of the Almagest) 
Wannan aikin sharhi ne da sake yin aiki na Almagest na Ptolemy kuma shine suka na farko da aka yi masa a yammacin Islama. Musamman da ya soki tushen lissafin. Alal misali, ya maye gurbin amfani da ka'idar Menelaus tare da waɗanda suka dogara akan spherical trigonometry , Ƙungiya ce ta masana ilimin lissafin Islama na ƙarni na 10 waɗanda suka haɗa da Abū al-Wafā' Būzjānī sannan kuma Abu Abd Allah Muhammad ibn Muadh Al-Jayyani wanda ya yi aiki a al-Andalus a ƙarni na 11 ne suka ƙirƙira waɗannan ka'idoji. Jābir bai yaba wa ko ɗaya daga cikin waɗannan marubutan ba kuma baya magana akan marubuci ɗaya na musulunci a cikin wannan aikin. 

Ɗaya daga cikin canji mai mahimmanci Jābir ya yi wa asusun Ptolemy shi ne cewa ya sanya kewayen Venus da Mercury, ƙananan taurari, a waje da na Rana, maimakon tsakanin Moon da Rana kamar yadda ya kasance a cikin aikin asali.

Mai ƙirƙira 

Ya ƙirƙira kayan aikin kallo wanda aka fi sani da torquetum, na'urar injiniya don canzawa tsakanin tsarin daidaitawa.

Tasiri 
Daga baya Jabir ya rinjayi marubutan musulmi da suka hada da Ibn Rushd (Averroes) da Nur ad-Din al-Betrugi, wadanda dukkansu suka yi aiki a al-Andalus. Maimonides ne ya kai aikin zuwa Masar a ƙarni na 12 da kuma yankin gabas a ƙarshen ƙarni na 13. 

An fassara aikin daga Larabci zuwa yaren Ibrananci da Latin, na ƙarshe ta Gerard na Cremona, wanda ya fassara sunansa a matsayin "Geber". Ta wannan fassarar, ta yi tasiri mai yawa a kan masana lissafi na Turai da masana ilmin taurari daga baya kuma ya taimaka wajen haɓaka trigonometry a Turai. 

Yawancin abubuwan da ke kan trigonometry mai siffar zobe a cikin Regiomontanus ' On Triangles (c.1463) an ɗauke su kai tsaye kuma ba tare da ƙima daga aikin Jābir ba, kamar yadda Gerolamo Cardano ya lura a cikin karni na 16.

Bayanan kula

Manazarta 
  (PDF version)

Hanyoyin haɗi na waje 
 

Haifaffun 1100
Mutuwan 1150
Mutane daga Seville