29 citations · 43 across the 8 of their papers we have counts for
8 papers
Analysis of a class of Lotka--Volterra systems
G. Moza, D. Constantinescu, R. Efrem +2
A generalized two-dimensional cubic Lotka-Volterra model with infinitesimal parameters is studied. Three different cases have been considered, one non-degenerate and two degenerate…
On the soliton solutions of a family of Tzitzeica equations
Corina N. Babalic, Radu Constantinescu, Vladimir S. Gerdjikov
We analyze several types of soliton solutions to a family of Tzitzeica equations. To this end we use two methods for deriving the soliton solutions: the dressing method and Hirota…
Description of Nonlinear Phenomena in the Atmospheric Dynamics through Linear Wave type Equations
Rodica Cimpoiasu, Radu Constantinescu
The paper takles a procedure which allow to extend some linear, wave type equations to the study of nonlinear models. More concretely, we present a practical way to generate the la…
Extended BRST symmetries. Quantum approach
Radu Constantinescu, Carmen Ionescu
The aim of this lecture is to present in a comprehensible way what the BRST quantization means and how the "classical" master equation, action and BRST transformations have to be p…
Generalized evolutionary equations with imposed symmetries
Rodica Cimpoiasu, Radu Constantinescu
The paper proposes an algorithm which could identify a general class of pdes describing dynamical systems with similar symmetries. The way that will be followed starts from a given…
Symmetries, Integrability and Exact Solutions for Nonlinear Systems
Rodica Cimpoiasu, Radu Constantinescu
The paper intends to offer a general overview on what the concept of integrability means for a nonlinear dynamical system and how the symmetry method can be applied for approaching…
Approximate Solutions to Second Order Parabolic Equations I: analytic estimates
Radu Constantinescu, Nick Costanzino, Anna L Mazzucato +1
We establish a new type of local asymptotic formula for the Green's function of a uniformly parabolic linear operator with non-constant coeff…
BRST-anti-BRST Antifield formalism : The Example of the Freedman-Townsend Model
G. Barnich, R. Constantinescu, P. Gregoire
The general BRST-anti-BRST construction in the framework of the antifield-antibracket formalism is illustrated in the case of the Freedmann-Townsend model.