Resumen
In this paper we demonstrate some specialized modules for investigating the dynamics of differential models, an integral part of a planned much more general Web-based application for scientific computing. As ?corrections? in the Lienard differential system is presented a class of orthogonal polynomials (also known as ?shell polynomials?). We will note that some specifics of the amplitudes of these polynomials open up the possibility of modeling signals from the field of antenna-feeder techniques. Algorithms and modules have been consistently used for: automatic generation of a theorem on the number and type of limit cycles (in the light of Melnikov?s considerations); study of the Hamiltonian of the system and ?level curves?; for the study of catastrophic surfaces (in the light of Zeeman?s considerations), etc. Similar studies have been carried out for associated polynomials. Numerical examples, illustrating our results using CAS MATHEMATICA are given.