2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/67932Following the idea of Galois-type extensions and entwining structures, we define the notion of a principal extension of noncommutative algebras. We show that modules associated to such extensions via finite-dimensional corepresentations are finitely generated projective, and determine an explicit formula for the Chern character applied to the thus obtained modules.4 pages, LaTeXK-Theory and HomologyQuantum Algebratext