2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/144978We present a few subjects from physics that have one in common: the spectral resolution of the Laplacian.24 pages. Contribution to the TSL Expository Lecture Series V "Computational Physical Sciences 2006", Universiti Putra MalaysiaChaotic Dynamicstext