翻訳と辞書 Words near each other ・ Abu Bakar Sillah ・ Abu Bakar Suleiman ・ Abu Bakar Taib ・ Abu Bakarr Fofanah ・ Abu Bakker Qassim ・ Abu Bakr ・ Abu Bakr (mansa) ・ Abu Bakr (name) ・ Abu Bakr Ahmad Haleem ・ Abu Bakr Ahmad ibn Ibrahim al-Madhara'i ・ Abu Bakr al Siddiq Mosque ・ Abu Bakr al-Ajurri ・ Abu Bakr al-Alami al-Idrissi ・ Abu Bakr al-Aydarus ・ Abu Bakr al-Baghdadi ・ Abu Bakr al-Hassar ・ Abu Bakr al-Kalabadhi ・ Abu Bakr al-Khallal ・ Abu Bakr al-Qirbi ・ Abu Bakr al-Sajistani ・ Abu Bakr Atiku ・ Abu Bakr Baira ・ Abu Bakr bin Yahya al-Suli ・ Abu Bakr Effendi ・ Abu Bakr ibn al-Arabi ・ Abu Bakr Ibn Al-Qutia ・ Abu Bakr ibn Faris ・ Abu Bakr ibn Muhammad ・ Abu Bakr ibn Muhammad ibn Hazm ・ Abu Bakr Ibn Mujāhid Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Abu Bakr al-Hassar ： ウィキペディア英語版 Abu Bakr al-Hassar Al-Hassar or Abu Bakr Muhammad ibn Abdallah ibn Ayyash al-Hassar was a Muslim mathematician from Morocco, living in the 12th century. He is the author of two books ''Kitab al-bayan wat-tadhkar'' (Book of Demonstration and Memorization), a manual of calculation and ''Kitab al-kamil fi sinaat al-adad'' (Complete Book on the Art of Numbers), on the breakdown of numbers. The first book is lost and only a part of the second book remains. Al-Hassar developed the modern symbolic mathematical notation for fractions, where the numerator and denominator are separated by a horizontal bar. This same fractional notation appeared soon after in the work of Fibonacci in the 13th century. ==References== 〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Abu Bakr al-Hassar」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.