The solution of Legendreequation has been introduced in the condition of natural limit and the emphasis is put on the inference to the coefficient of the Legendre function.
介绍勒让德方程在自然边界条件下的解，重点推导了勒让德函数的系数。
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In this paper, the effect of Legendre expansion of scattering phase function with a finite number of terms on solving radiative transfer equation is studied and an improved algorithm suggested.