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# David Duncan : The Chern-Simons invariants for general compact Lie groups

The Chern-Simons invariants are 3-manifold invariants arising from representations of the fundamental group into a Lie group G. These have been well-studied for G = SU(2), but much less is known about them for more general G. In this talk, I will review the definition of these invariants and discuss results that extend to arbitrary compact G several well-known SU(2)-computations. These extensions all have the flavor of "if you know the invariants for SU(2), then you know the invariants for general compact G". This is joint work with Kevin Fournier.

**Category**: Geometry and Topology**Duration**: 01:34:39**Date**: November 12, 2018 at 3:10 PM**Views**: 163-
**Tags:**seminar, Geometry/topology Seminar

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