Gauge invariance on interaction U(1) bundles

Abstract

The structure of the algebra of gauge-invariant differential forms on the bundle C × ME is determined, where p:C→M is the bundle of connections of a U(1) principal bundle π : P→M, and E→M is the associated bundle to P by the representation λr, rinBbb N, of U(1) on Bbb C given by λr(z)(w) = zrw, zinU(1), winBbb C.