Cauchy-Laurent Series Then f()can be expressed as the bilateral series n=-00 where 2丌 ∮(=)(=-=0)m r 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  