当区域中有n个孤立奇点时 5f()=2乐()=2m∑Resx((h) # i=1 b bl 1 l 2 l 3 l 1 b 2 b 3 b 当区域中有 n 个孤立奇点时 ( ) ( ) 2 Re ( ( )). 1 1    = = = = n i i l n i l f z dz f z dz i s f b i  #