Equivariant characteristic classes in the bundle of connections

Details Equivariant characteristic classes in the bundle of connections Equivariant characteristic classes in the bundle of connections

2003-07-09

arxiv.org/abs/math-ph/0307022v2

J. Geom. Phys. 54 (2005) 197--212

Physics

Mathematical Physics

16 pages

Scientific paper

The characteristic forms in the bundle of connections of a principal bundle P over M determine the characteristic classes of P for degree less or equal to the dimension of M, and differential forms on the space of connections for higher degree. The equivariant characteristic classes provide canonical equivariant extensions of this forms, and so cohomology classes in the quotient space of connections modulo gauge transformations. More generally, given a closed differential form in M and a characteristic form, we obtain a cohomology class in the space of connections modulo gauge transformations, and we show that these classes coincide with some classes previously defined by Atiyah and Singer.

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