围绕着八s)的奇点s的附近绕一圈环的积分就 等于 5f(s)ds=∑cn(-s)ds fc,(s-So)ds=2of(s-so)"ds =-00 1=-00 2z_=2T j Reslf(s) 其中C是只围绕S转一圈的任意闭合曲线围绕着f(s)的奇点s0的附近绕一圈环的积分就 等于 2 j 2 jRes ( ) ( ) d ( ) d ( )d ( ) d 0 1 0 0 0 c f s c s s s c s s s f s s c s s s s s n C n n n C n n C n n n C = - + =- + =- + =- = = = - = - = -          其中C是只围绕s0转一圈的任意闭合曲线