

Open Problems For Equienergetic Graphs





نویسنده

Gutman Ivan

منبع

Iranian Journal Of Mathematical Chemistry  2015  دوره : 6  شماره : 2  صفحه:185 187



چکیده

The energy of a graph is equal to the sum of the absolute values of its eigenvalues. two graphs of the same order are said to be equienergetic if their energies are equal. we point out the following two open problems for equienergetic graphs. (1) although it is known that there are numerous pairs of equienergetic, noncospectral trees, it is not known how to systematically construct any such pair. (2) if by numerical calculation one finds that two noncospectral graphs seem to be equienergetic, in the general case no method is known for proving that this indeed is the case.

کلیدواژه

Graph Energy ,Equienergetic Graphs ,Spectrum (Of Graph)

آدرس

University Of Kragujevac, Faculty Of Science, Serbia














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