Abstract: A method, apparatus, system, and signal-bearing medium that in an embodiment select a simulator input fragment, characterize an I/O model using a set of simulator input fragments, create a set of behavioral models based on the characterization and compare the set of behavioral models to the I/O model. In an embodiment, the set of behavioral models is compared to the I/O model by creating simulator input decks that include net topology for the I/O model and the set of behavioral models, simulating the decks, and comparing the output from the simulating.

Abstract: A method and computer program product are provided for implementing a stable integral equation model for both the time and frequency domains. The stabilization method of the invention is applicable to electric field integral equation (EFIE) formulations, to magnetic field integral equation (MFIE) formulations, and to combined field integral equation (CFIE) formulations. For example, an EFIE formulation can be used in the circuit domain called partial element equivalent circuit (PEEC). Each volume cell is subdivided into a finite number of partitions. A partial inductance term is calculated consisting of a summation over all the finite number of partitions in each cell. Each surface cell is subdivided into a finite number of subcells. A coefficient of potential term is calculated consisting of a summation over all the finite number of subcells in each surface cell. Both the partial inductances and the coefficients of potential are calculated without increasing the number of unknowns.