We next consider the selection of a set of KVL equations to match this reduced number of unknown currents. Imagine the circuit that results if we were to kill all current sources by replacing them by open the original circuit that are not meshes in the original circuit since they are not empty, they had current sources inside them. These are called supermeshes. This new circuit has one less mesh per current source than the original. KVL around loops in the circuit defined as the set of meshes that result when all current sources are removed yields the complete set of mesh analysis equations for circuits containing current sources. In Fig. 4.19(b), if the current sources were killed, there would remain only a single mesh traversing the three resistors and the voltage source. This is not a mesh in the original circuit, since in encloses a current source. Writing KVL around