Institute for Informatics and Automation Problems of NAS RA


Home

About Institute

	Short history
	Administration
	Departments
	Councils
	Documents
	Contacts

Scientific Activity

	Main Fields
	Programs
	Periodicals
	Partnership
	R&D Projects
	Scientific Events

Education

	Postgraduate School
	MD School

Resources

	ASNET-AM
	ARMGRID
	Library

Personal Data

Full name		Zhora Nikoghosyan

Phone		(+374 93) 508819

E-mail		zhora@ipia.sci.am

Position

Senior Scientific Researcher

Research Interests

Discrete Mathematics, Graph Theory and Combinatorics. Existence problems of long (large) cycles and paths in graphs, as well as spanning trees in graphs with few end vertices (leaves) and few branch vertices - in forms of various generalizations and improvements of classical results based on minimum degree, connectivity, toughness, forbidden subgraphs and outside structures.

Education

M.Sc.

Yerevan State University, Department of Applied Mathematics

Titles, Degree

Ph.D. in Mathematical Cybernetics, Minsk Institute of Mathematics, Byeloruss Academy of Sciences, Thesis: “On two generalizations of hamiltonian problem in graph theory”

Professional Experience

Senior Scientific Researcher		Institute for Informatics and Automation Problems of NAS RA,(1999 – present)
Lecturer		Gyumri Information Technologies Center (2005-2011)
Senior Lecturer		Institute for Raising the Qualification of Teachers, (1989 – 1993)
Scientific Researcher		Institute for Informatics and Automation Problems of NAS RA, (1974 – 1989)

Selected Publications

Zh. Nikoghosyan, On maximal cycle of a graph (Russian), DAN Arm. SSR, v. LXXII, No. 2 (1981) 82-87.

R. Häggkvist and G.G. Nicoghossian, A remark on hamiltonian cycles, J. Combin. Theory Ser. B 30 (1981) 118-120.

Zh. Nikoghosyan, Spanning trees on simple 3-polytopes (Russian), Kybernetika, No. 4 (1982) 35-42.

Zh. Nikoghosyan, n-spanning and hypo-n-spanning graphs (Russian), tanulmanyok, No. 135, Budapest (1982) 153-167.

Zh. Nikoghosyan, On maximal cycles of a graph (Russian), Studia Scientiarum Mathematicarum Hungarica 17 (1982) 251-282.

Zh. Nikoghosyan, A sufficient condition for a graph to be hamiltonian (Russian), DAN Arm. SSR, v. LXXVIII, No. 1 (1984) 12-16.

Zh. Nikoghosyan, An hamiltonian sufficient condition of a graph (Russian), Matematicheskie voprosy kibernetiki i vychislitelnoj tekhniki, v. XIV (1985) 34-54.

Zh. Nikoghosyan, On longest cycles in graphs (Russian), DAN Arm. SSR, v. LXXXI, No. 4 (1985) 166-170.

Zh.G. Nikoghosyan, Path-Extensions and Long Cycles in Graphs, Mathematical Problems of Computer Science 19 (1998) 25-31.

Zh,G. Nikoghosyan, Cycle-Extensions and Long Cycles in Graphs, Mathematical Problems of Computer Science 21 (2000) 121-128.

Zh.G. Nikoghosyan, Cycle-Extensions and Long Cycles in k-connected Graphs, Mathematical Problems of Computer Science 21 (2000) 129-155.

Zh.G. Nikoghosyan, Discrete Mathematics (Armenian), Gyumri Information Technologies Center (2007) 334 p.

Zh.G. Nikoghosyan, Dirac-type generalizations concerning large cycles in graphs, Discrete Mathematics 309 (2009) 1925-1930, doi: 10.1016/j.disc.2008.03.011.

M.Zh. Nikoghosyan, Zh.G. Nikoghosyan, Large cycles in 4-connected graphs, Discrete Math. 311 (2011) 302-306. doi:10.1016/j.disc.2010.10.020.

Zh.G. Nikoghosyan, “Graph Invariants and Large Cycles: A Survey”, International Journal of Mathematics and Mathematical Sciences, vol. 2011, Article ID 206404, 11 pages, 2011. doi:10.1155/2011/206404.

Zh.G. Nikoghosyan, Pure Links Between Graph Invariants and Large Cycle Structures, New Frontiers in Graph Theory, Dr. Yagang Zhang (Ed.) (2012) 19-42, ISBN: 978-953-51-0115-4, InTech, Available from: http://www.intechopen.com/books/new-frontiers-in-graph-theory/pure-links-between-graph-invariants-and-large-cycle-structures-

Zh.G. Nikoghosyan, Two Sufficient Conditions for Hamilton and Dominating Cycles, International Journal of Mathematics and Mathematical Sciences, Article in Press, v. 2012, ID 185346, 25p. DOI: 10.1155/2012/185346.

Zh.G. Nikoghosyan, Disconnected forbidden subgraphs, toughness and Hamilton cycles, ISRN Combinatorics, Volume 2013, Article ID 673971, 4 pages, http://dx.doi.org/10.1155/2013/673971.

Zh.G. Nikoghosyan, Advanced Lower Bounds for the Circumference, Graphs and Combinatorics 29 (2013) 1531-1541. DOI: 10.1007/s00373-012-1209-4.

Events

	Conferences
	Workshops
	Seminars
	Trainings
	Scientific Council
	Specialised Council

News

The graded test in Informatics for PhD applicants will take place on April 26, 2018 at 11:00 in the Institute for Informatics and Automation Problems (Room 333).

The qualifying test in Informatics for PhD students will take place on May 16, 2018 at 11:00 in the Institute for Informatics and Automation Problems (Room 333).

2018թ. մայիսի 20-ից 25-ը Երևանում կկայանա Սերգեյ Մերգելյանի ծննդյան 90-ամյակին նվիրված գիտաժողով, որին հրավիրված ելույթով կմասնակցեն Հայաստանից, Ռուսաստանից, Վրաստանից ու ԱՄՆ-ից ժամանող հայտնի գիտնականներ: Գիտաժողովի մասին մանրամասները կարելի է գտնել http://mergelyan-90.sci.am/ կայքում: Գրանցման վերջնաժամկետը մայիսի 1-ն է, իսկ համառոտագրերի ուղարկման վերջնաժամկետը՝ ապրիլի 20-ը:

Հայաստանյան մասնակիցների համար մասնակցավճար չի գանձվելու:

Armenian National Academy of Sciences selected as new ‘FabSpace’