MATRIX MODELS AND MARGINAL OPERATORS IN THE PLANAR LIMIT
G. M. Cicuta, E. Montaldi · Modern Physics Letters A · 1990
The role of monomials which are power of traces of matrices in matrix models with polynomial interaction potential is examined. Because of well-known factorization properties, the density of eigenvalues is trivially obtained in the planar limit by the saddle point method. Different susceptibilities have positive or negative critical coefficients.