4 papers
Ratio of the number of -nearly independent vertex subsets and the Merrifield-Simmons index
Audace A. V. Dossou-Olory, Eric O. D. Andriantiana, Valisoa R. M. Rakotonarivo +1
The number of induced subgraphs with size of a graph was introduced recently as the number of -nearly independent vertex subsets of . Results highlighting s…
Characterization of Trees with Maximum Security
Alex S. A. Alochukwu, Audace A. V. Dossou-Olory, Fadekemi J. Osaye +5
The rank (also known as protection number or leaf-height) of a vertex in a rooted tree is the minimum distance between the vertex and any of its leaf descendants. We consider the s…
Bicyclic graphs with the smallest and largest numbers of connected sets
Audace A. V. Dossou-Olory
For a graph with vertex set , let N() denote the number of nonempty subsets of that induce a connected graph in . In this paper, we focus on determining N() for…
On the average size of -nearly independent vertex sets in graphs
Audace A. V. Dossou-Olory, Eric O. Andriantiana
A -nearly independent vertex subset of a graph is a set of vertices that induces a subgraph containing exactly edges. For , this coincides with the classical noti…