2 papers
math.CO2025
Some sharp bounds on the average Steiner (k, l)-eccentricity for trees
Cheng Zeng, Gengji Li
In this paper we introduce some transformations for trees that do not increase the average Steiner -eccentricity for all . Using these transformations,…
math.CO2025
The comparison of two Zagreb-Fermat eccentricity indices
Xiangrui Pan, Cheng Zeng, Longyu Li +1
In this paper, we focus on comparing the first and second Zagreb-Fermat eccentricity indices of graphs. We show that $$\frac{\sum_{uv\in E\left( G \right)}{\varepsilon_3\left( u \r…