Zobrazeno 1 - 10
of 24
pro vyhledávání: '"Hajar Shooshtari"'
Publikováno v:
Discrete Mathematics Letters, Vol 5, Pp 41-48 (2021)
Externí odkaz:
https://doaj.org/article/3dc7c90a69c94377bea4de9e2398904a
Publikováno v:
Polycyclic Aromatic Compounds. :1-12
Publikováno v:
Journal of Chemistry, Vol 2021 (2021)
Irregularity indices are usually used for quantitative characterization of the topological structure of nonregular graphs. In numerous applications and problems in material engineering and chemistry, it is useful to be aware that how irregular a mole
Externí odkaz:
https://doaj.org/article/eafb27abe53c434db5763acb682df0f8
Publikováno v:
Journal of Mathematics, Vol 2021 (2021)
Let G be a simple graph of order n and A be its adjacency matrix. Let λ1≥λ2≥…≥λn be eigenvalues of matrix A. Then, the energy of a graph G is defined as εG=∑i=1nλi. In this paper, we will discuss the new lower bounds for the energy of
Externí odkaz:
https://doaj.org/article/5d527cb4e3c54877b54b9b1a05589321
Publikováno v:
Polycyclic Aromatic Compounds. :1-9
Publikováno v:
Acta Universitatis Sapientiae, Mathematica. 14:239-249
Graph theory has applications in various fields due to offering important tools such as topological indices. Among the topological indices, the Randić index is simple and of great importance. The Randić index of a graph 𝒢 can be expressed as R (
Publikováno v:
Polycyclic Aromatic Compounds. :1-9
Publikováno v:
Polycyclic Aromatic Compounds. 43:1482-1494
Publikováno v:
Asian-European Journal of Mathematics. 16
Let G be a simple, finite, undirected graph with n vertices. The main purpose of this paper introduces the concepts of the minimum covering Gutman Estrada index, the minimum covering Seidel Estrada index, the minimum covering distance Estrada index,
Publikováno v:
Asian-European Journal of Mathematics. 15
The sum-connectivity index of a graph [Formula: see text] is defined as the sum of weights [Formula: see text] over all edges [Formula: see text] of [Formula: see text], where [Formula: see text] and [Formula: see text] are the degrees of the vertice