The abduction mapping method was introduced to deduce the transformation relation between the non-unbendable surface and the flat surface.
利
微分几何中的诱导映射理论求得非可展曲面到平面域内的变换
。
The abduction mapping method was introduced to deduce the transformation relation between the non-unbendable surface and the flat surface.
利微分几何中的诱导映射理论求得非可展曲面到平面域内的变换。
A relatively direct method is expounded in this paper to prove the termwise differentiation of power series, and a simple method is expressed to calculate the Fourier coefficient.
比较直接的方法证明幂级数的和函数在收
域内可以逐项微分的公式；并得到了计算傅
数的一种简便方法.
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