Alfraganus

Alfraganus:

see Al-FarghaniAl-Farghani
or Alfraganus
, d. after 861, Arab astronomer. Al-Farghani was born in Farghana, Transoxania (present-day Fergana, Uzbekistan), and died in Egypt. His most important work, written between 833 and 857, is Elements,
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References in periodicals archive ?
He based his conclusion on the ninth century Baghdadi commentator on Ptolemy, Alfraganus (Al-Farghani), who had corrected Ptolemy's length of a terrestrial degree; Alfraganus was cited in the Ymago Mundi of Pierre D'Ailly (printed in Louvain in 1483), which was consulted by Columbus.
Al-Sulaiti referred to the eighth century philosopher Abu Nasr al-Farabi, who analysed the studies Plato and Aristotle from Islamic perspective, the 19th century's scientist Ahmad Al-Farghani, also known as Alfraganus in the West, who authored "Elements of Astronomy on the Celestial Motions".
Amongst Islamic writers, the most important are: Albumasar, Alfraganus, Alchabitius, Avicenna, and Averroes.
Quizas pudieramos encontrar un lejano antecedente respecto del uso del cuadrante marino y del compas, en las noticias que pudieron traer los misioneros franciscanos Guillermo Rubruck y Juan de Piano Carpini, en los viajes que realizaron hacia el ano de 1246 hasta las nacientes del Oxus (Amur Darya), que fertiliza el valle de Ferghana, patria de Alfraganus, el astronomo contratado por Al Mamun, tercer califa de Bagdad.