Abstract
Virasoro irregular conformal block with arbitrary rank is obtained for the classical limit or equivalently Nekrasov-Shatashvili limit using the beta-deformed irregular matrix model (Penner-type matrix model for the irregular conformal block). The same result is derived using the generalized Mathieu equation which is equivalent to the loop equation of the irregular matrix model.
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Rim, C., Zhang, H. Classical Virasoro irregular conformal block. J. High Energ. Phys. 2015, 163 (2015). https://doi.org/10.1007/JHEP07(2015)163
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DOI: https://doi.org/10.1007/JHEP07(2015)163