2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/69278Gouvea and Mazur made a precise conjecture about slopes of modular forms. Weaker versions of this conjecture were established by Coleman and Wan. In this note, we exhibit explicit examples contradicting the full conjecture as it currently stands.4 pagesNumber Theory11F11A counterexample to the Gouvea--Mazur conjecturetext