Math Colloquium

Speaker: S. Ahmad Mojallal(GERAD, HEC Montreal)

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

The energy of a graphG, is defined as the sum of the absolute values of all eigen-values ofG. In this talk, we study the difference of energies of a (regular) graphGand its complete graph. In particular, we provide the answer to Problem 12 raisedin [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 graphin terms of the order and the clique cover number​

Category

Lectures, Seminars

Time

Starts:
Ends:

Location

#319 Colloquium Room Chase Building 

Cost

Free

Contact

Ellen Lynch