Virasoro constraint for Nekrasov instanton partition function
arXiv:1207.5658 · doi:10.1007/JHEP10(2012)097
Abstract
We show that Nekrasov instanton partition function for SU(N) gauge theories satisfies recursion relations in the form of U(1)+Virasoro constraints when β = 1. The constraints give a direct support for AGT conjecture for general quiver gauge theories.
23 pages, 7 figures. v2: typos corrected
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