K. Das

activity

20152026

most citedComparison of Wiener index and Zagreb eccentricity indices

10 citations · 21 across the 14 of their papers we have counts for

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2 papers · 1 filter

math.CO2026

Energy of signed graphs and the vertex cover number

Aniruddha Samanta, Deepshikha, Kinkar Chandra Das

The energy $E (Γ)$ of a signed graph $Γ = (G, σ)$ is the sum of the absolute values of the eigenvalues of its adjacency matrix $A (Γ)$ . In this article, we prove that $\mathca…

math.CO2026

Hoffman-type Results for the Sum of k Largest Eigenvalues of a Graph

Shaowei Sun, Mengyao Guo, Hongyan Ge +1

Let $S_{k} (G)$ denote the sum of the $k$ largest eigenvalues of a graph $G$ . Motivated by the classical Hoffman program for the spectral radius of a graph, we investigate an additive…