Jabir ibn Aflah

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Abu Muhammad Jabir ibn Aflah (Arabic: ¿¿¿ ¿¿¿¿ ¿¿¿¿ ¿¿ ¿¿¿¿¿, 1100 in Seville, Spain - 1150) was an Arab Muslim astronomer, mathematician and inventor whose works, once translated into Latin (under his Latinized name Geber), influenced later European mathematicians and astronomers. He invented an observational instrument known as the torquetum, a mechanical device to transform between spherical coordinate systems.Gerolamo Cardano noted much of the material of Regiomontanus on spherical trigonometry was plagiarised from the twelfth-century work of the Jäbir ibn AflaH[4].Similarly the trigonometry that Nicholas Copernicus (1473-1543) outlined in the first part of his epochal work De revolutionibus was also apparently inspired by Jabir ibnAflah.