Priti Prasanna Mondal

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20242026

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2 papers · 1 filter

math.SP2026

Neighbourhood second Zagreb matrix of graphs: spectral radius bounds and extremal graphs

Subhendu Chakraborty, Priti Prasanna Mondal

Let $G$ be a connected graph on at least two vertices, and let $δ (i)$ be the sum of the degrees of the neighbours of a vertex $i$ . The \emph{neighbourhood second Zagreb matrix} $\N…

math.CO2026

Spectral Radius, Vertex Deletion, and Chromatic Number of Signed Graphs

Abhay Jayarajan, M. Rajesh Kannan, Priti Prasanna Mondal +1

A signed graph $Σ = (G, σ)$ is a graph $G$ with edges given signs $1$ or $- 1$ defined by the function $σ$ . The adjacency matrix of $Σ$ is defined as per these signs. The relation betw…