2+Ad=0 b1.自然的周期边界条件 d(q+2丌)=d()=m 0.1.2 a()=A cos mo+Bm sin mo sin 0(sin 0)+[(+Isin 6-dJo=0 de d b2.1阶缔合勒让德方程 x=cos0 sin e de sin e r a ---SIn a0 ax (1-x2),]+[(+1)(1-x2)-m]=00 2 2 + = d d sin (sin ) [ ( 1)sin ] 0 2 + + − = l l d d d d b1. 自然的周期边界条件: ( + 2 ) = () = m 2 m = 0,1,2, () = Am cosm + Bm sin m b2. l-阶缔合勒让德方程 x = cos x x x x x = − − = − = sin sin sin (1 ) 2 2 (1 ) [(1 ) ] [ ( 1)(1 ) ] 0 2 2 2 2 + + − − = − − l l x m dx d x dx d x