The two Zagreb indices M 1=∑ vd (v) 2 and M 2=∑ uvd (u) d (v) are vertex-degree-based
graph invariants that have been introduced in the 1970s and extensively studied ever since …

For any real number α, the sum of the α-th powers of the degrees of a (molecular) graph G,
denoted by 0Rα (G), is known as the general zeroth–order Randic index as well as the …

The recently introduced class of vertex–degree–based molecular structure descriptors,
called Sombor indices (SO), are examined and a few of their basic properties established …

Abstract The Sombor index SO, the reduced Sombor index SO red, and the average Sombor
index SO avg have been introduced recently, and it was shown that they have good …

ON SOME MATHEMATICAL PROPERTIES OF SOMBOR INDICES Page 1 BULLETIN OF THE
INTERNATIONAL MATHEMATICAL VIRTUAL INSTITUTE ISSN (p) 2303-4874, ISSN (o) …

S (G)=∑ uv∈ E (G)√ dG (u) 2+ dG (v) 2 where dG (u) denote the degree of the vertex u in
G. In this article, we determine the extremal values of the Sombor index of trees with some …

Harmonic Index and its Generalizations: Extremal Results and Bounds Page 1 Harmonic Index
and its Generalizations: Extremal Results and Bounds Akbar Ali1, Lingping Zhong2, Ivan …

Inverse Problem for Sigma Index Page 1 Inverse Problem for Sigma Index ∗ Ivan Gutman1,†,
Muge Togan2, Aysun Yurttas2, Ahmet Sinan Cevik3, Ismail Naci Cangul2 1Faculty of Science …

Zagreb Energy and Zagreb Estrada Index of Graphs Page 1 Zagreb Energy and Zagreb
Estrada Index of Graphs Nader Jafari Rad1,∗, Akbar Jahanbani1, Ivan Gutman2 1Department …

A comparative study based on the structureYproperty regression analysis is performed in
order to test and evaluate the application possibilities of various graph irregularity indices for …