Visited nearly 40 institutions, among them was visiting professor in HKUST, Hong Kong (1997, 2001), in UNED Madrid, Spain (2005) , Research Fellow in ICTP, Italy (2002-2009); Research in Pairs in Oberwolfach, Germany (2009).
Participation in Conferences
Plenary lectures: 17th Nevanlinna (Finnish-Romanian) Conference, Brashov 2000, 6th Congress of International Society for Analysis its Applications and Computation, Ankara 2007, Conference on Singularity theory and complex analysis, Tbilisi 2008.
Codirector jointly with Prof. H. Begehr of the NATO Advanced research Workshop "Analysis and applications", Yerevan, September 22 -25, 2002.
Chair of local organizing committee of the "ISAAC Conference on Complex Analysis, Differential Equations and Related Topics", Yerevan, September 17-21, 2002.
Organizer of special session "Zeros and Gamma Lines -- Value distributions of real and complex functions and Mappings" at 7th ISAAC CONGRESS, Imperial College, London, Jule 13-18, 2009. Organizer of special session "Value Distribution Theory of complex functions, Generalizations and related topics" at 5th ISAAC CONGRESS, Catania, Italy, June 26-30, 2005. Organizer of special session "Value Distribution Theory of complex functions, Generalizations and related topics" at 4th ISAAC CONGRESS, York University, Toronto, Canada, August 16-21, 2003.
Member of organizing committee of the conference "Mathematical Analysis and Economics", Sumy (Ukraine), April 1-4, 2003. Member of organizing committee of the conference "Mathematical Analysis", Lviv (Ukraine), October, 2000. Member of organizing committee of the conference "Mathematical Analysis", (dedicated to the memory of Professor Belyi), Donetzk, May, 1999.
Obtained more than 30 grants, among them 2 DAAD , 3 INTAS, 2 ANSEF, 1 fellowship, 3 visiting professorship, ~ 20 for visits and collaboration.
Obtained some new results (nearly 15) related to the basic concepts in mathematics such as: arbitrary algebraic plane curve, complex polynomials, analytic and meromorphic functions in a given domain; enough smooth plane curves, real and complex functions of one and two variables; solutions of large classes of differential equations. Some of these results have no predecessors. Others generalize widely preceding studies in the frames of Hilbert problem 16 in the real algebraic geometry, of Nevanlinna and Gamma-lines theories in the complex analysis, of Poincaré theory in the ODE.
A part of the mentioned above results was presented in my plenary lecture given at the 6th ISAAC Congress (2007) and published in Barsegian G., Some interrelated results in different branches of geometry and analysis, p. 3-33, in book "Further progress in analysis. Proceedings of the 6th International ISAAC Congress", editors H. Begehr, O. Celebi and R. Gilbert, World Scientific, 2009.
For the publications see MathSciNet.
The research papers and preprints were published in Armenia, England, Germany, Georgia, Honk Kong, Hungary, India, Italy, Poland, Romania, Russia, Singapore, Spain, Switzerland, Japan, Yugoslavia, USA.