2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/68877We study certain resonance-counting functions for potential scattering on infinite cylinders or half-cylinders. Under certain conditions on the potential, we obtain asymptotics of the counting functions, with an explicit formula for the constant appearing in the leading term.Spectral TheoryAnalysis of PDEs58J50 (Primary), 35P25 (Secondary)text