2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/133257This is a semi-expository article concerning Langlands functoriality and Deligne's conjecture on the special values of $L$-functions. The emphasis is on symmetric power $L$-functions associated to a holomorphic cusp form, while appealing to a recent work of Mahnkopf on the special values of automorphic $L$-functions.22 pages. To appear in the proceedings of the AIMS workshop (in August 2005) on Eisenstein series and applicationsNumber TheoryRepresentation Theory11F67; 11F70, 22E50, 22E55text