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		Control of planar Bautin bifurcation, 
		The 17th Conference On Applied and Industrial Mathematics, 
		CAIM 2009, Universitatea navala “Mircea cel Batrân” din Constanta, Romania, 17-20 septembrie 2009.
                (with Sterpu M.).
                       
		Bifurcation in a nonlinear business cycle model,
		 The 16th Conference On Applied and Industrial Mathematics, CAIM 2008, 
		Universitatea Agora din Oradea, Romania, 9-11 octombrie 2008.
                (with Sterpu M.).
                       
		Stability and Hopf bifurcation in a nonlinear IS-LM model with time delay. Applications,
		 The International Conference of Differential Geometry and Dynamical Systems DGDS 2008, 
		Mangalia, August 29 - September 2, 2008
                (with Sterpu M.).
                       
		Hopf bifurcation for coupled identical dynamical systems. Applications,
		 6-th International Congress of Romanian Mathematicians, Bucuresti, 28 iunie-4 iulie, 2007. 
                (with Sterpu M.).
                       
		Stability and Hopf Bifurcations for Two Advertising Systems, Coupled with Delay,
		 International Conference on Nonlinear Analysis and Applied Mathematics, Grecia, 16-20 sept. 2007
                (with Sterpu M.).
 
                       
		Fold and Hopf bifurcations in non-symmetrically coupled dynamical systems,
		 The 14th Conference On Applied and Industrial Mathematics, CAIM 2006, 
		Universitatea din Stat din Chisinau, Rep. Moldova, 17-19 august 2006.
                (with Sterpu M.).
   
                       
		Liapunov coefficients in non-symmetrically coupled systems, International  Conference On Applied Analysis and Differential Equations, Universitatea din Iasi, 4 -9 septembrie 2006. 
                (with Sterpu M.).
		
                       
		Center manifolds and bifurcations for coupled Hopf oscillators, The 
                13-th Conference on Applied and Industrial Mathematics, Piteşti (Romania), Oct. 14-16,  2005  
                (with
                Sterpu M.).
                
                      Bifurcation in Hopf coupled oscillators, 
                the 7th 
                National Conference of Mathematical Analysis and Its 
                Applications, Craiova (Romania), Sept. 23-24, 2005 (with
                Sterpu M.).
                
                     Nonhyperbolic singularities in a system of two coupled 
                offer-request models,
                Chişinău 
                (Moldavia), Aug. 16-20, 2004 (with
                Sterpu M.).
                
                       Periodic behavior in a system of two non-simmetrically 
                coupled advertising oscillators, the 12-th Conference on 
                Applied and Industrial Mathematics,
                Piteşti (Romania), Oct.15-17, 2004.
                
                      Bifurcation in a system of two coupled 
                offer-request oscillators, Septieme Colloque Franco-Roumain 
                de Mathematiques Appliquees, Craiova (Romania), Aug. 30-Sept. 3, 
                2004 (with                 Sterpu M.).
                
                     Nonhyperbolic singularities in a system of 
                two coupled oscillators, the 11-th Conference on Applied and 
                Industrial Mathematics, Oradea, (Romania) 2003 (with
                Sterpu M.).
                
                       Bifurcation in a system of two coupled advertising oscillators, 
                the 5-th Congress of Romanian mathematicians, Piteşti (Romania), 2003 
                (with
                Sterpu M.).
                
                      Local 
                bifurcation for the FitzHugh-Nagumo system, Conference on 
                Analysis and Optimization of Differential Systems, Constanţa 
                (Romania), September 9-14, 2002 (with
                Sterpu M.).
                
                      Two approximations of homoclinic 
                bifurcation curves in the FitzHugh-Nagumo system, the 10-th 
                Conference on Applied and Industrial Mathematics, Piteşti 
                (Romania), October 11-13, 2002 (with
                Sterpu M.).
                
                   Heteroclinic 
                bifurcation for the FitzHugh-Nagumo system, the 9th 
                Conference on Applied and Industrial Mathematics, Piteşti 
                (Romania), October, 2001 (with Georgescu A., Giurgiţeanu 
                N.).
                
                  Codimension one 
                and two bifurcations for the FitzHugh-Nagumo system, 3rd 
                European Congress of Mathematics, Barcelona (Spain), July 10-14, 
                2000 (with Georgescu A., Giurgiţeanu N.).
                
                  Global 
                bifurcations for the FitzHugh-Nagumo model, Conference on 
                Bifurcation, Symmetry and Patterns, Porto (Portugal) June 30- 
                July 4, 2000 (with Georgescu A., Giurgiţeanu N.).
                
                  Dynamic 
                bifurcation diagram for the FitzHugh-Nagumo model, Workshop 
                on Reaction-Diffusion Equations and Travelling Waves, Varsaw 
                (Poland), May 20-27, 2000 (with Georgescu A., Giurgiţeanu 
                N.).
                
  		   Center manifolds and saddle-node bifurcation 
                for the FitzHugh-Nagumo system, the 8th 
                Conference on Applied and Industrial Mathematics, Piteşti 
                (Romania), October 13-15, 2000.
                
                  Hopf and 
                homoclinic bifurcations in a biodynamical system, Second 
                Conference on Applied Mathematics, Baia Mare (Romania), October 
                19-21, 2000 (with Georgescu A., Giurgiţeanu N.).
                
            Concavity of the 
                limit cycles in the FitzHugh-Nagumo model, the 7th 
                Conference on Applied and Industrial Mathematics, Piteşti 
                (Romania), October 15-17, 1999 (with Georgescu A., Giurgiţeanu 
                N.).
                
                   Canards in the 
                FitzHugh-Nagumo model, International Congress of 
                Mathematicians, Berlin (Germany), August 18-27, 1998 (Abstracts of Short Communications and 
                Poster Sessions, pp.188) (with Georgescu A., Giurgiţeanu 
                N.).
                
                   On the 
                oscillatory regimes in the FitzHugh-Nagumo system, 
                International symposium on Power-Law Modeling of Biological 
                Systems, Oeiras, (Portugal), October 4-7, 1998 (Abstracts book, 
                pp. 43) (with Georgescu A., Giurgiţeanu N.).
                
                   Global 
                bifurcation diagram for the FitzHugh-Nagumo system, 
                International symposium on Power-Law Modeling of Biological 
                Systems, Oeiras, (Portugal), October 4-7, 1998 (Abstracts book, 
                pp. 32) (with Georgescu A., Giurgiţeanu N.).
                
                
                 
                 Regimes with two or three limit cycles in the 
                FitzHugh-Nagumo system, Gesellshaft fur angewande mathematik 
                und mechanik, Annual Scientific Conference GAMM98, University of 
                Bremen (Germany), April 6-9, 1998 (Book of Abstracts, pp.45) 
                (with Georgescu A., Giurgiţeanu N.). 
                
                   Canard 
                phenomenon for the FitzHugh-Nagumo model for negative parameter 
                b, Symposium organized by “Tiberiu Popoviciu” Institute of 
                Numerical Analysis, Cluj-Napoca, (Romania), May 27-29, 1998 
                (with Georgescu A., Giurgiţeanu N.).
                
                   Dynamics and 
                bifurcation in a biological model (III), the 6th 
                Conference on Applied and Industrial Mathematics, Piteşti 
                (Romania), October 16-18, 1998 (with Georgescu A., Giurgiţeanu 
                N.).
                
                
                 
                 Bifurcation and oscillatory regimes for the 
                FitzHugh-Nagumo model, 8-th International Colloquium on 
                Differential Equations, Plovdiv (Bulgaria), August 18-23, 
                1997 (Abstracts of Invited Lectures and Short Communications, 
                pp.80) (with Georgescu A., Giurgiţeanu N.).
                
                
                
                 Canard phenomenon in the FitzHugh-Nagumo 
                model, the 5th 
                Conference on Applied and Industrial Mathematics, Oradea-Băile 
                Felix (Romania), October 17-19, 1997 (with Georgescu A., Giurgiţeanu 
                N.).
                
                
                 
                 Bifurcation in the Goodwin model from 
                economics I, the 5th 
                Conference on Applied and Industrial Mathematics, Oradea-Băile 
                Felix (Romania), October 17-19, 1997 (with Georgescu A., Giurgiţeanu 
                N.). 
                
                
                 
                 Linear and nonlinear dynamics in Goodwin 
                model from economics, Session of Scientific Communications, 
                Univ. of Piteşti (Romania), November 21-22, 1997 (with Georgescu A., Giurgiţeanu 
                N.).
                
                   Dynamics and 
                bifurcation in a biological model (II),  3rd 
                European Conference on Mathematics Applied to Biology and 
                Medicine, Heidelberg (Germany), October 6-10, 1996 (Abstracts, 
                pp. 356) (with Georgescu A., Giurgiţeanu N.).
                
                
                 
                  Dynamics and bifurcation in a 
                biological model (I) - Conference on Dynamical Systems in 
                Biology and Medicine, Veszprem (Hungary), July 17-20, 1996 
                (Abstracts, pp.39) (with Georgescu A., Giurgiţeanu N.).
                
                   Two types of 
                dynamic bifurcation in a biodynamical system, the 4th  
                Conference on Applied and Industrial Mathematics, 
                Oradea-Chişinău (Romania),  August, 
                1996 (with Georgescu A., Giurgiţeanu N.).
                
                 A mathematical model for obtaining the 
                arterial pressure, the Third Conference on Applied and 
                Industrial Mathematics, ROMAI, Oradea-Chişinău (Romania), August 
                17-25, 1995.
                
                  Criterium de 
                minimum dans l’ejection ventriculaire gauche, Seminaire 
                Scientifique Geometrie Computationnelle, Informatique et 
                Biomathematique, Craiova (Romania),  May 21, 1993 (with
                Boju V., Georgescu D., Ionescu A.).
                
                  
                On the Cunningham projections,  
                7-th Colloquium on Linear Ordonate Topological Spaces, ICMAT, 
                Craiova (Romania), June 14-16,  1986 (with Niculescu C.,  Rădulescu V., Turcitu G.).     |  |