A bstract We study a Hermitian matrix model with the standard quartic potential amended by tr( R Φ 2 ) term for fixed external . This is motivated curvature in truncated Heisenberg algebra formulation of Grosse-Wulkenhaar — renormalizable noncommutative field theory. The extra breaks unitary symmetry action and leads, after perturbative calculation integral, to an effective multitrace model. Ac...

Abstract We develop approximate estimation methods for exponential random graph models (ERGMs), whose likelihood is proportional to an intractable normalizing constant. The usual approach approximates this constant with Monte Carlo simulations; however, convergence may be exponentially slow. propose a deterministic method, based on variational mean-field approximation of the ERGM's compute lowe...

this paper describes the application of approximate methods to invert airborne magnetic data as well as helicopter-borne frequency domain electromagnetic data in order to retrieve a joint model of magnetic susceptibility and electrical resistivity. the study area located in semnan province of iran consists of an arc-shaped porphyry andesite covered by sedimentary units which may have potential ...

In this paper an coupled Burgers' equation is considered and then a method entitled interval finite-difference method is introduced to find the approximate interval solution of interval model in level wise cases. Finally for more illustration, the convergence theorem is confirmed and a numerical example is solved.