caa a22 4500 388113383 CHVBK 20180307125359.0 cr unu---uuuuu 161130e199909 xx s 000 0 eng 10.1017/S0957423900001351 doi S0957423900001351 pii (NATIONALLICENCE)cambridge-10.1017/S0957423900001351 Sur une construction du miroir parabolique par Abū al-Wafā´ al-Būzjānī [Elektronische Daten] Abū al-Wafā' al-Būzjānī proposed, in a fragment established and translated herein, two methods to build a parabolic mirror. The lack of demonstration, particularly for the first method, raises a difficult question of interpretation. To understand this method, O. Neugebauer used, in an unpublished article translated herein, concepts of descriptive geometry. He then eliminated the space construction used, to keep only simple geometrical considerations known by the Greeks. The second interpretation, given by R. Rashed, is based on the geometrical practices of al-Būzjānī's contemporaries, like al-Qūhī and Ibn Sahl, i.e. on the methods of conical projections. The second method borrowed by al-Būzjānī from Ibn Sinān seems to support this last interpretation. Copyright © Cambridge University Press 1999 Neugebauer Otto Institute for Advanced Study, Princeton Rashed Roshdi Centre d'histoire des sciences et des philosophies arabes et médiévales, 7 rue Guy Môquet, B.P. n˚ 8, 94801 Villejuif Cedex, France Arabic Sciences and Philosophy Cambridge University Press 9/2(1999-09), 261-277 0957-4239 9:2<261 1999 9 ASP https://doi.org/10.1017/S0957423900001351 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0957423900001351 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Neugebauer Otto Institute for Advanced Study, Princeton NATIONALLICENCE 700 1- Rashed Roshdi Centre d'histoire des sciences et des philosophies arabes et médiévales, 7 rue Guy Môquet, B.P. n˚ 8, 94801 Villejuif Cedex, France NATIONALLICENCE 773 0- Arabic Sciences and Philosophy Cambridge University Press 9/2(1999-09), 261-277 0957-4239 9:2<261 1999 9 ASP CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge