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Spherical harmonics Wiki: Spherical harmonics forms a complete orthogonal functions with each function defined on the sphere. Reference Video Spherica 阅读全文
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Gaussian quadrature Wiki: Gaussian quadrature indicates that the integral of a function can be replaced as a weight sum of function values at some poi 阅读全文
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Lagrange polynomial (All the below are from Wiki.) Wiki: Lagrange polynomials are used for polynomial interpolation of a given set of points \((x_j,y_ 阅读全文