Iw. Sandberg, AN ALGORITHM FOR SOLVING THE EQUATIONS OF MONOTONE NONLINEAR RESISTIVE-NETWORKS, International journal of circuit theory and applications, 22(5), 1994, pp. 357-361
An algorithm related to the PQ theorem is given for solving the equati
ons of a large class of monotone non-linear resistive networks. The al
gorithm converges to a solution whenever a solution exists, while it p
roduces an unbounded sequence of iterates if there is no solution.