arXiv · hep-th/9506002
The other topological twisting of N=4 Yang-Mills
Abstract
We present the alternative topological twisting of N=4 Yang-Mills, in which the path integral is dominated not by instantons, but by flat connections of the COMPLEXIFIED gauge group. The theory is nontrivial on compact orientable four-manifolds with nonpositive Euler number, which are necessarily not simply connected. On such manifolds, one finds a single topological invariant, analogous to the Casson invariant of three-manifolds.
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Neil Marcus. 1995-06-01. The other topological twisting of N=4 Yang-Mills. https://doi.org/10.1016/0550-3213(95)00389-a
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