The Cochrun-Grabel (C-G) method, an algorithm for finding the characteristi
c polynomial of a circuit containing reactances, has so far been restricted
to circuits not employing mutual inductances,
In this paper we present an intuitive, yet rigorous, proof of the Cochrun-G
rabel method for a general RLC circuit, and me extend the method to allow t
he analysis of an RLC circuit containing mutual inductances.