Partition functions of matrix models as the first special functions of string theory: Finite Hermitian one-matrix model

A. S. Alexandrov; A. D. Mironov; A. Yu. Morozov

A. S. Alexandrov ; A. D. Mironov ; A. Yu. Morozov

Teoretičeskaâ i matematičeskaâ fizika, Tome 142 (2005) no. 3, pp. 419-488 Cet article a éte moissonné depuis la source Math-Net.Ru

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Résumé

Although matrix model partition functions do not exhaust the entire set of $\tau$-functions relevant for string theory, they are elementary blocks for constructing many other $\tau$-functions and seem to capture the fundamental nature of quantum gravity an string theory properly. We propose taking matrix model partition functions as new special functions. This means that they should be investigated and represented in some standard form without reference to particular applications. At the same time, the tables and lists of properties should be sufficiently full to exclude unexpected peculiarities appearing in new applications. Accomplishing this task requires considerable effort, and this paper is only a first step in this direction. We restrict our consideration to the finite Hermitian one-matrix model an concentrate mostly on its phase and branch structure that arises when the partition function is considered as a $D$-module. We discuss the role of the CIV-DV prepotential (which generates a certain basis in the linear space of solutions of the Virasoro constraints, although an understanding of why and how this basis is distinguished is lacking) an evaluate several first multiloop correlators, which generalize the semicircular distribution to the case of multitrace and nonplanar correlators.

Keywords: matrix models, string theory, multiloop correlators.

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     title = {Partition functions of matrix models as the first special functions of string theory: {Finite} {Hermitian} one-matrix model},
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A. S. Alexandrov; A. D. Mironov; A. Yu. Morozov. Partition functions of matrix models as the first special functions of string theory: Finite Hermitian one-matrix model. Teoretičeskaâ i matematičeskaâ fizika, Tome 142 (2005) no. 3, pp. 419-488. http://geodesic.mathdoc.fr/item/TMF_2005_142_3_a0/

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