The Sombor Index (Coindex) and Lanzhou Index (Coindex) of Some Graphs

In this paper, motivated by the recently introduced topological indices—the Sombor index, Sombor coindex, and Lanzhou index, we define a new index—the Lanzhou coindex of a graph. Furthermore, we investigate the Sombor index (coindex) and the Lanzhou index (coindex) of tadpole graphs, wheel graphs, and two-dimensional grid graphs, as well as their paraline graphs.

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Journal
Axioms
Published
2025-02-24
DOI
https://doi.org/10.3390/axioms14030164
Primary Topic
Graph theory and applications
Type
article
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article

The Sombor Index (Coindex) and Lanzhou Index (Coindex) of Some Graphs

Raxida Guji, Mihrigul Wali
Axioms
Graph theory and applications
article

The Sombor Index (Coindex) and Lanzhou Index (Coindex) of Some Graphs

Raxida Guji, Mihrigul Wali
article en

Abstract

In this paper, motivated by the recently introduced topological indices—the Sombor index, Sombor coindex, and Lanzhou index, we define a new index—the Lanzhou coindex of a graph. Furthermore, we investigate the Sombor index (coindex) and the Lanzhou index (coindex) of tadpole graphs, wheel graphs, and two-dimensional grid graphs, as well as their paraline graphs.

AxiomsVol. 14(3)
Xinjiang University of Finance and Economics (CN)
Openalex Percentile: Top 93%
Graph theory and applications
DOIOpen Access PDFOpenAlex
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The Sombor Index (Coindex) and Lanzhou Index (Coindex) of Some Graphs — Raxida Guji, Mihrigul Wali · Axioms (2025) | TGRS Research Map | TGRS