Ibn Mu'adh al-Jayyani

Al-Jayyānī
Born989
Iraq
Died1079
Academic background
InfluencesEuclid, al-Khwarizmi
Academic work
EraIslamic Golden Age
Main interestsMathematics, Astronomy

Abū ʿAbd Allāh Muḥammad ibn Muʿādh al-Jayyānī (Arabic: أبو عبد الله محمد بن معاذ الجياني; 989, Cordova, Al-Andalus – 1079, Jaén, Al-Andalus) was an Arab mathematician, Islamic scholar, and Qadi from Al-Andalus (in present-day Spain). Al-Jayyānī wrote important commentaries on Euclid's Elements and he wrote the first known treatise on spherical trigonometry.