Cauchy-Laurent Series Then f(z)can be expressed as the bilateral series f()=∑an(x-= 1=-00 where f(=)(z-=0)(n 2丌j being a closed and counterclockwise integration contour contained in Q Copyright C 2001, S K MitraCopyright © 2001, S. K. Mitra 9 • Then f (z) can be expressed as the bilateral series being a closed and counterclockwise integration contour contained in Cauchy-Laurent Series ( 1) ( ) ( ) 1 ( )( ) 2 n n o n n n o f z z z f z z z dz j      =− − + = − = −   where  