3 papers
math.SP2025
A new kind of $A_{\p}$-matrix for mixed graphs
Piyush Sharma, Ravinder Kumar
Nikiforov\cite{nikiforov2017merging} introduced the concept of the $A_{\p}$-matrix as a convex linear combination of a graph's adjacency matrix and its diagonal matrix of vertex de…
math.CO2025
New improved lower bounds for Zagreb indices of graphs
Mamta Verma, Ravinder Kumar
This paper presents new lower bounds for the first general Zagreb index involving two, three, and four arbitrary degrees of vertices of a simple graph . For the specia…
math.FA2025
Some central moments inequalities with applications
Mamta Verma, Ravinder Kumar
In this paper, we first derive an inequality involving central moments for n real numbers, which in turn provides an extension of Theorem 2.2 of Wolkowicz and Styan [18]. Furthermo…