期刊： TRANSACTIONS ON COMBINATORICS, 2021; 10 (4)
The connective eccentricity index (CEI) of a graph G is defined as xi(ce)(G) = Sigma(v is an element of V(G)) d(G)(v)/epsilon(G)(v), where d(G)(v) is ......
期刊： TRANSACTIONS ON COMBINATORICS, 2021; 10 (3)
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) = Sigma(......
