The [[path integral]] of a holomorphic function '''f''' around the [[boundary]] of a simple region '''D''' is equal to the sum of [[complex residue]]s of '''f''' in the interior of '''D'''. | The [[path integral]] of a holomorphic function '''f''' around the [[boundary]] of a simple region '''D''' is equal to the sum of [[complex residue]]s of '''f''' in the interior of '''D'''. |