2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/10664We present a new Eulerian code able to follow the evolution of large-scale structures in the Universe in the weakly nonlinear regime. We compare test results with a N-body code and analytical results.12 pages, Postscript file, figures 6-8 available as gifs. Original postscript at http://www.mpa-garching.mpg.de/~tomek/papers/cppa/ Accepted for publication in Acta AstronAstrophysicstext