2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/152491In this talk we go over several new developments regarding the techniques for a large class of non-hermitian matrix models with unitary randomness (complex random numbers). In particular, we discuss: (a) - A diagrammatic approach based on a $1/N$ expansion (b) - A generalization of the addition theorem (R-transformation) (c) - A conformal transformation on the position of pertinent singularities (d) - A `phase' analysis using appropriate partition functions (e) - A number of two-point functions and the issue of universality.18 pages, 8 EPS figures included; Talk presented by M.A. Nowak at the NATO Workshop ``New Developments in Quantum Field Theory'', June 14-20, 1997, Zakopane, PolandHigh Energy Physics - PhenomenologyChaotic DynamicsCondensed Mattertext