2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/150523Automated algorithms for derivation of amplitude equations in the vicinity of monotonic and Hopf bifurcation manifolds are presented. The implementation is based on Mathematica programming, and is illustrated by several examples22 pages, \psfig macro, 2 figuresChaotic Dynamicstext