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Séminaire “Un chercheur du GERAD vous parle!”

On the difference of energies of a graph and its complement graph

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27 nov. 2019   15h30 — 16h30

Seyed Ahmad Mojallal HEC Montréal, Canada

The energy of a graph G, is de fined as the sum of the absolute values of all eigenvalues of G. In this talk, we study the difference of energies of a (regular) graph G and its complement graph. In particular, we provide the answer to Problem 12 raised in [V. Nikiforov, Remarks on the energy of regular graphs, Linear Algebra Appl. 508 (2016) 133-145]. Moreover, we give a lower bound for the energy of a regular graph in terms of the order and the clique cover number.


Du café et des biscuits seront offerts au début du séminaire.
Bienvenue à tous!

Pierre Hansen responsable

Lieu

Salle 4488
Pavillon André-Aisenstadt
Campus de l'Université de Montréal
2920, chemin de la Tour Montréal QC H3T 1J4 Canada

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