沉着 发表于 2025-4-1 05:37:48
Georges Brunel,duced himself in his first letter to Poincaré, he wrote as a “comrade”, i. e. fellow normalien of Paul Appell and Émile Picard, although both, to be sure, were a few years ahead of him there (Appell entered the École normale in 1873, Picard in 1874).Generalize 发表于 2025-4-1 06:22:18
Felice Casorati,8] of 1868 was one of the first textbooks on the subject in any language. Apart from the highly informative 143 pages of historical introduction, the book is notable for taking a largely Riemannian approach to the foundations of the subject. The second volume that Casorati hinted at in his letter was never written.FANG 发表于 2025-4-1 14:13:54
10楼faultfinder 发表于 2025-4-1 14:32:52
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