A note on W symmetry of N=2 gauge theory [PDF]
Wei HeThe AGT correspondence indicates $\mathcal{N}=2$ gauge theory possesses of W algebra symmetry. We study how the conformal block of Toda CFT gives the expectation value of Casimir operators of gauge theory. The $A_2$ Toda CFT with $W_3$ symmetry is taken as the main example.View original: http://arxiv.org/abs/1206.2844
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