Legendre polynomials

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In mathematics, Legendre functions are solutions to Legendre‘s differential equation:

In particular, it occurs when solving Laplace‘s equation (and relatedpartial differential equations) in spherical coordinates.

The polynomials may be denoted by P_n(x) , called the Legendre polynomial of order n. The polynomials are either even or odd functions of x for even or odd orders n. The first few polynomials are shown below.

The general form of a Legendre polynomial of order n is given by the sum:

From the Legendre polynomials can be generated another important class of functions for physical problems, the associated Legendre functions.

Legendre polynomials

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原文地址：http://www.cnblogs.com/hiramlee0534/p/5539709.html