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 complete 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.
Coffee and biscuits will be offered at the beginning of the seminar.
Welcome to everyone!
Université de Montréal Campus