Cech_Cohomology
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想到当年老范对我说的,exp把一个不是紧的实轴变成紧的,成为一个李群。现在还不完全理解。 【欧拉恒等式Euler's identity】e^(iπ)+1=0。其中e是自然对数函数的底数,i是虚数单位,π是圆周率。被许多人认为体现数学之美:有三种数学运算:加乘幂;五个基本数学常数(e≈ 2.71828182845904523536028747135266249;i=(-1)^(1/2);π≈ 3.14159 265358979323846 264338327950288) 展开全文转发 1评论 0 原微博 Cech_Cohomology
(1/2) The increasing popularity of Tocqueville reflects the increasing concern, of which the Chinese "nobility" nowadays is characteristic, about an equally intense impending revolution, nevertheless, 展开全文原微博