The coefficient matrix has all the same properties it did in the absence of voltage sources: the on-diagonal elements are the sum of all conductances into the node or supernode at which that equation was written, the element is the negative sum of cobductances connecting the ith equation’s node or supernode with the jth equation’s, and matrix is symmetric. The source vector on the right-hand side, however, is no longer simply the net current in due to current sources, since it now contains terms due to the voltage sources as well.