2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/71479From a certain strongly equivariant bundle gerbe with connection and curving over a smooth manifold on which a Lie group acts, we construct under some conditions a bundle gerbe with connection and curving over the quotient space. In general, the construction requires a choice, and we can consequently obtain distinct stable isomorphism classes of bundle gerbes with connection and curving over the quotient space. A bundle gerbe naturally arising in Chern-Simons theory provides an example of the reduction.47 pages, LaTex 2e, Xypic, errors correctedDifferential Geometrytext