14 citations · 24 across the 27 of their papers we have counts for
4 papers · 1 filter
Short note on Randić energy
Luiz Emilio Allem, Gonzalo Molina, Adrián Pastine
In this paper, we consider the Randić energy of simple connected graphs. We provide upper bounds for in terms of the number of vertices and the nullity of the graph. We p…
On the null structure of bipartite graphs without cycles of length a multiple of 4
Daniel A. Jaume, Gonzalo Molina, Adrián Pastine
In this work we study the null space of bipartite graphs without cycles of length multiple of , and its relation to structural properties. We decompose them into two subgraphs:…
The number of s-separated k-sets in various circles
Emiliano J. J. Estrugo, Adrián Pastine
This article studies the number of ways of selecting objects arranged in circles of sizes such that no two selected ones have less than objects between…
On the structure of the fundamental subspaces of acyclic matrices with in the diagonal
Daniel A. Jaume, Adrián Pastine
A matrix is called acyclic if replacing the diagonal entries with , and the nonzero diagonal entries with , yields the adjacency matrix of a forest. In this paper we show tha…