2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/153232A weakly nonlinear model for two-dimensional Faraday waves over infinite depth is derived and studied. Sideband instability of monochromatic standing waves as well as non-monochromatic solutions are studied analytically. Persistent irregular regimes are found numerically.6 pages, Latex, 2 embedded Encapsulated PostScript Figures, submitted to Europhys. LettersPattern Formation and Solitonstext