1207.5658 (Shoichi Kanno et al.)

Virasoro constraint for Nekrasov instanton partition function    [PDF]

Shoichi Kanno, Yutaka Matsuo, Hong Zhang

We show that Nekrasov instanton partition function for SU(N) gauge theories satisfies recursion relations in the form of U(1)+Virasoro constraints when {\beta} = 1. The constraints give a direct support for AGT conjecture for general quiver gauge theories.

View original: http://arxiv.org/abs/1207.5658