Ararat Harutyunyan
Welcome! I am currently a research fellow (chercheurvisiteur) at the Mathematical Institute, University of Toulouse III (Paul Sabatier), in the research team ESP (Probability and Statistics).
I am an organizer of the Probability seminar .
Background
Curriculum Vitae.
2014 Sept.  2015 Sept.: Research Fellow, LIP, ENS de Lyon.
2013 Sept.  2014 Sept.: Research Fellow, Mathematical Institute, University of Oxford.
2012 Oct.  2013 Sept.: Digiteo Postdoctoral researcher, Laboratoire de Recherche en Informatique (LRI), Universite
ParisSud.
2011 Sept.  2012 June: Postdoctoral researcher and instructor, Simon Fraser University.
2008 Sept.  2011 June: Ph.D. in Mathematics, Simon Fraser University.
Supervisor: Bojan Mohar.
Thesis Title:
Brookstype Theorems for Coloring of Digraphs.
2006 Sept.  2008 Aug.: MSc. in Mathematics, McGill University.
Supervisors: Jacques Verstraete
and Dmitry Jakobson.
Thesis Title: Probabilistic Methods and Domination Related Problems in Graphs.
2003 Sept.  2006 Aug.: BSc Honours in Mathematics, McGill University.
Research Interests
My research interests are in graph theory. In particular,
I am interested in structural graph theory, random graphs,
probabilistic and discharging methods
and combinatorial and randomized graph algorithms.
Publications

A. Harutyunyan, T.N. Le, A. Newman, S. Thomassé,
Coloring dense digraphs .

N. Bousquet, L. Esperet, A. Harutyunyan, R. de Joannis de Verclos,
Exact distance coloring in trees.
, submitted to Combinatorics, Probability and Computing .

A. Harutyunyan, T.N. Le, S. Thomassé, H. Wu,
Coloring tournaments: from local to global
, submitted to Journal of Combinatorial Theory (Ser. B)
.

J. Bensmail, A. Harutyunyan, N.K. Le, B. Li, N. Lichiardopol,
Disjoint cycles of different lengths in graphs and digraphs,
submitted to Electronic Journal of Combinatorics .

J. Bensmail, A. Harutyunyan, N.K. Le,
List coloring digraphs
, submitted to Journal of Graph Theory.

J. Bensmail, A. Harutyunyan, T.N. Le, S. Thomassé,
Edgepartitioning a graph into paths: beyond the BarátThomassen conjecture
, submitted to Combinatorica
.

A. Harutyunyan, L. Pastor, S. Thomassé
Disproving the normal graphs conjecture
, submitted to Journal of Combinatorial Theory (Ser. B) .
 F. Foucaud, A. Harutyunyan, P. Hell, S. Legay, R. Naserasr, Y. Manoussakis,
The complexity of tropical graph homomorphisms , Discrete Applied Mathematics , to appear.

A. Harutyunyan, P. Horn, J. Verstraete,
Independent dominating sets in graphs of girth five ,Combinatorics,
Probability and Computing, accepted.

J. Bensmail, A. Harutyunyan, T.N. Le, M. Merker, S. Thomassé,
A proof of the BarátThomassen conjecture , Journal of Combinatorial Theory, Ser. B 124, pp. 39 – 55, 2017.
 A. Harutyunyan, B. Mohar,
Planar digraphs of digirth five are 2colorable , Journal of Graph Theory 84(4): 408  427, 2017 .
 JA. Angles d'Auriac, N. Cohen, A. El Maftouhi, A. Harutyunyan, S. Legay, Y. Manoussakis,
Connected tropical subgraphs in vertexcolored graphs , Discrete Mathematics and Theoretical
Computer Science 17:3, pp. 327348, 2016 .
 A. Harutyunyan, R. Naserasr, M. Petrusevski, R. Skrekovski, Q. Sun,
Mapping planar graphs into the Coxeter graph, Discrete Mathematics 339, pp. 839  849, 2016 .

A. Harutyunyan, S. Legay, Linear time algorithms
for weighted offensive and powerful alliances in trees
, Theoretical Computer Science 582, pp. 17  26, 2015 .
 A. El Maftouhi, A. Harutyunyan, Y. Manoussakis,
Weak balance in random signed graphs , Internet Mathematics 11(2), pp. 143154, 2015.
 J. Bensmail, A. Harutyunyan, H. Hocquard, P. Valicov,
Strongedge coloring of planar graphs , Discrete Applied Mathematics 179, pp. 229234, 2014.

A. Harutyunyan, Global Offensive Alliances
in Graphs and Random Graphs.
, Discrete Applied Mathematics 164, pp. 522526, 2014.

A. Harutyunyan, Some bounds on
global alliances in trees , Discrete Applied Mathematics 161, pp. 17391746, 2013 .

A. Harutyunyan, P.M. Kayll, B. Mohar, L. Rafferty,
Uniquely Dcolorable digraphs with large girth ,
The Canadian Journal of Mathematics 64, 13101328, 2012.
 A. Harutyunyan, B. Mohar, Planar graphs
have exponentially many 3arboricities , SIAM Journal on Discrete Mathematics 26(3), pp. 12691280, 2012.

A. Harutyunyan, B. Mohar,
Two results on the digraph chromatic number , Discrete Mathematics 312(10), pp. 18231826, 2012 .

A. Harutyunyan, B. Mohar, Gallai's Theorem
for List Coloring of Digraphs , SIAM Journal on Discrete Mathematics 25(1), pp. 170180, 2011.

A. Harutyunyan, B. Mohar, Strengthened
Brooks Theorem for digraphs of girth three , The Electronic Journal of Combinatorics 18 (2011), #P195.

A. Harutyunyan, A Fast Algorithm for
Powerful Alliances in Trees
, 4th International Conference on
Combinatorial Optimization and Applications ( COCOA 2010 ), KailuaKona, HI, USA,
LNCS 6508 (1) 2010: 3140.

A. Harutyunyan, Global Offensive Alliances in Graphs via
Degree Sequences , VI LatinAmerican Conference Algorithms, Graphs and Optimization Symposium ( LAGOS 2011 ).

A. Harutyunyan, Some Bounds on Alliances in Trees, 9th Cologne Twente Workshop on Graphs and Combinatorial Optimization
( CTW 2010 ), Cologne, Germany, 2010: 8386.
Useful homepages
Bojan Mohar,
Stéphan Thomassé ,
Jacques Verstraete,
Pavol Hell
Colin McDiarmid,
Alex Scott,
Jacob Fox
Conferences I will attend in 20162017
Advanced Mathematics for Network Analysis
, Luchon, France, May 14, 2016.
SIAM Conference on Discrete Mathematics
, Atlanta, USA, June 610, 2016.
Bordeaux Graph Workshop
, Bordeaux, France, November 710, 2016.
CanaDAM
, Toronto, Canada, June 1216, 2017.
Teaching
In addition to the following courses taught as a lecturer, I have also served as a teaching
assistant for many different courses such as Graph Theory, Algebra, Linear Optimisation.
Graph Theory (First year students), Winter 2016, SupaeroIsae, Toulouse.
MACM 201 (Discrete Mathematics II), Winter 2012, SFU. Teaching Evaluation .
MATH 150 (Calculus I), Fall 2011, SFU. Teaching Evaluation .
Some slides of talks
A proof of the BaratThomassen Conjecture, 3rd Bordeaux Graph Workshop, Bordeaux, France, November 710, 2016
Slides .
Colorings in planar graphs and digraphs, SIAM conference on Discrete Mathematics, Minneapolis, USA, June 1619, 2014 Slides .
Independent dominating sets via semirandom method, Slides .
Sparsity and homomorphisms of digraphs, Slides .
Miscellaneous
Erdos number: 2 (through Pavol Hell
)