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Ettore Bortolotti (6 March 1866 – 17 February 1947) was an Italian mathematician.〔(An Italian short biography of Ettore Bortolotti ) in ''Edizione Nazionale Mathematica Italiana'' online. 〕 ==Biography== Bortolotti was born in Bologna. He studied mathematics under Salvatore Pincherle and Cesare Arzelà in Bologna. He graduated in mathematics in 1889 at the University of Bologna, under Pincherle. He was appointed as lecturer to the Lyceum of Modica in Sicily in 1891, then studied one year in Paris as a post-graduate, before lecturing at the University of Rome in 1893. In 1900, he became professor for infinitesimal calculus at Modena. There, he became dean from 1913 to 1919, then moved back to the University of Bologna, where he retired in 1936. Bertolotti must also be considered a differential geometer and a relativist too. In fact, in the year 1929, he commented on the geometric basis for Einstein’s absolute parallelism theory in a paper entitled "Stars of congruences and absolute parallelism: Geometric basis for a recent theory of Einstein".〔E. Bortolotti, ''Stelle di congruenze e parallelismo assoluto: basi geometriche di una recente teoria di Einstein'', Rend. Reale Acc. dei Lincei 9 (1929), 530-538.〕〔E. Bortolotti, ''On metric connections with absolute parallelism'', Proc. Kon. Akad. Wet. Amsterdam 30 (1927), 216-218.〕 Bortolotti died in Bologna. 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「Ettore Bortolotti」の詳細全文を読む スポンサード リンク
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