Journal
THEORETICAL AND MATHEMATICAL PHYSICS
Volume 142, Issue 3, Pages 349-411Publisher
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1007/s11232-005-0031-z
Keywords
matrix models; string theory; multiloop correlators
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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 and 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 and 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) and evaluate several first multiloop correlators, which generalize the semicircular distribution to the case of multitrace and nonplanar correlators.
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