2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/170591We develop a procedure for detecting Fermi liquid instabilities by extending the analysis of Pomeranchuk to two-dimensional lattice systems. The method is very general and straightforward to apply, thus providing a powerful tool for the search of exotic phases. We test it by applying it to a lattice electron model with interactions leading to $s$ and d-wave instabilities.8 pages, 3 figuresStrongly Correlated Electronstext