The commuting graph of a finite non-abelian group G with center Z (G), denoted by Γ c (G), is
a simple undirected graph whose vertex set is G∖ Z (G), and two distinct vertices x and y are …

The energy of a graph G, denoted by E (G), is defined as the sum of the absolute values of
all eigenvalues of G. In this paper we present some new lower bounds for energy of non …

Suppose is an-vertex simple graph with vertex set and,, is the degree of vertex in. The ISI
matrix of is defined by if the vertices and are adjacent and otherwise. The-eigenvalues of are …

ENERGIES OF GRAPHS SURVEY, CENSUS, BIBLIOGRAPHY Ivan Gutman & Boris Furtula
Page 1 ENERGIES OF GRAPHS SURVEY, CENSUS, BIBLIOGRAPHY Ivan Gutman & Boris …

Let G be a simple connected graph and let α be a real number. The graph invariant σα (G)
introduced as the sum of the αth powers of the normalized signless Laplacian eigenvalues …

Let G be a simple graph of order n. The eigenvalue of a graph G is the eigenvalue of its
adjacency matrix. The energy E (G) of G is the sum of absolute values of its eigenvalues. A …

The singular values of a matrix A are defined as the square roots of the eigenvalues of A⁎ A,
and the energy of A denoted by E (A) is the sum of its singular values. The energy of a graph …

Energy of a simple graph $ G $, denoted by $\mathcal {E}(G) $, is the sum of the absolute
values of the eigenvalues of $ G $. Two graphs with the same order and energy are called …

Let G be a simple graph with n vertices, m edges and having adjacency eigenvalues λ1,
λ2,..., λn. The energy E (G) of the graph G is defined as E (G)=∑ ni= 1| λi|. In this paper, we …

The Nirmala matrix of a graph and its energy have recently defined. In this paper, we
establish some features of the Nirmala eigenvalues. Then we propose various bounds on …