On the universality of matrix models for random surfaces
A. Schneider - Th. Filk
FB 7, Theoretische Physik, Universität Essen, D-45117 Essen, Germany - Institut für Theoretische Physik, Universität Freiburg, Hermann-Herder-Strasse 3, D-79104 Freiburg, Germany
Received: 9 Novemver 1998 / Published online: 1 March 1999
We present an alternative procedure to eliminate irregular contributions in the perturbation expansion of -matrix models representing the sum over triangulations of random surfaces, thereby reproducing the results of Tutte [#!Tutte!#] and Brézin et al.[#!bipz!#] for the planar model. The advantage of this method is that the universality of the critical exponents can be proven from general features of the model alone without explicit determination of the free energy and therefore allows for several straightforward generalizations including cases with non-vanishing central charge c< 1.