This survey lists all papers on graph energies, known to the authors, published in 2019, and
summarizes their main collective characteristics. In addition to new mathematical results, in …

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

In this paper, we focus on the index (largest eigenvalue) of the adjacency matrix of
connected signed graphs. We give some general results on the index when the …

The p-energy of ak-vertex digraph D is defined by E p (D)=∑ j= 1 k| R (λ j) I (λ j)|, where λ
1,…, λ k are eigenvalues of D and R (λ j) and I (λ j) are respectively real and imaginary parts …

Let Sn be the class of bicyclic signed digraphs with n vertices whose two signed directed
even cycles are vertex-disjoint. In this paper, we characterize the ordering of bicyclic signed …

The concept of energy of a signed digraph is extended to iota energy of a signed digraph.
The energy of a signed digraph $ S $ is defined by $ E (S)=\sum_ {k= 1}^ n|\text {Re}(z_k) …

Let S=(G, σ) be a signed graph of order n and size m and let x1, x2,..., xn be the eigenvalues
of S. The energy of S is defined as E (S)= n∑ j= 1| xj|. A connected signed graph is said to …

The energy and iota energy of signed digraphs are respectively defined as the sum of
absolute values of real parts and sum of absolute values of imaginary parts of its …