全微分 do p+ou csdp √2 sind= cos-=d√2p+√2 od cos V2p d(2p cos l(,9)=√2 O cOS-+l f(p,)=u(p, p)+iv(p, p )=v2p cos y +iv2psin +uo=v2pe 2+uo 2pe"+=√2z+l1 cos sin cos 2 2 cos 2 2 2 2 2 2 u u du d d d d d d                 = + = − = +   全微分 ( 2 cos ) 2 d  =  0 ( , ) 2 cos 2 u u     = + 2 0 0 ( , ) ( , ) ( , ) 2 cos 2 sin 2 2 2 i f u iv i u e u             = + = + + = + 0 0 2 2 i e u z u  = + = + 