2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/68401Some inequalities in 2-inner product spaces generalizing Bessel's result that are similar to the Boas-Bellman inequality from inner product spaces, are given. Applications for determinantal integral inequalities are also provided.Functional AnalysisClassical Analysis and ODEs46C05, 46C99, 26D15, 26D10text