作者: A. Mironov , Al. Morozov , And. Morozov
DOI: 10.1016/J.NUCLPHYSB.2010.10.016
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摘要: Abstract Operator product expansion (OPE) of two operators in two-dimensional conformal field theory includes a sum over Virasoro descendants other operator with universal coefficients, dictated exclusively by properties the algebra and independent choice particular model. In free model, these coefficients arise only special “conservation” relation imposed on three dimensions involved OPE. We demonstrate that for unconstrained formalism when additional Dotsenko–Fateev integrals are inserted between positions original product. If such combined to form an n -point block Riemann sphere, one reproduces earlier conjectured β -ensemble representation blocks. The statement can also be regarded as 3 j -symbols slightly generalized Selberg I Y , associated arbitrary Young diagrams. blocks multilinear combinations AGT conjecture relates them Nekrasov functions which have exactly same structure.