Abstract
Since the (β-deformed) hermitian one-matrix models can be represented as the integrated conformal field theory (CFT) expectation values, we construct the operators in terms of the generators of the Heisenberg algebra such that the constraints can be derived by inserting the constructed operators into the integrated expectation values. We also obtain the second order total derivative operators associating with the derived constraint operators and analyze their properties. We explore the intrinsic connection between the derived constraint operators and W-representations of some matrix models. For the Gaussian hermitian one-matrix model in the external field and β-deformed N×N complex matrix model, we investigate the superintegrability and derive the corresponding character expansions from their W-representations. Moreover a conjectured formula for the averages of Jack polynomials in the literature is proved.
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