J. Ryan

activity

20152026

most citedMonitoring the edges of a graph using distances

42 citations · 54 across the 10 of their papers we have counts for

collaborators

Showing 2016Show all

4 papers · 1 filter

cs.DM2016★ 4 cited

On the power domination number of de Bruijn and Kautz digraphs

Cyriac Grigorious, Thomas Kalinowski, Joe Ryan +1

Let $G = (V, A)$ be a directed graph without parallel arcs, and let $S \subseteq V$ be a set of vertices. Let the sequence $S = S_{0} \subseteq S_{1} \subseteq S_{2} \subseteq \dots$ be defined a…

math.CO2016★ 1 cited

An algebraic approach to lifts of digraphs

C. Dalfó, M. A. Fiol, M. Miller +2

We study the relationship between two key concepts in the theory of (di)graphs: the quotient digraph, and the lift $Γ^{α}$ of a base (voltage) digraph. These techniques contract or e…

math.CO2016★ 1 cited

From expanded digraphs to lifts of voltage digraphs and line digraphs

C. Dalfó, M. A. Fiol, M. Miller +1

In this note we present a general approach to construct large digraphs from small ones. These are called expanded digraphs, and, as particular cases, we show the close relationship…

cs.DM2016★ 1 cited

$H$ -supermagic labelings for firecrackers, banana trees and flowers

Rachel Wulan Nirmalasari Wijaya, Andrea Semaničová-Feňovčíková, Joe Ryan +1

A simple graph $G = (V, E)$ admits an $H$ -covering if every edge in $E$ is contained in a subgraph $H^{'} = (V^{'}, E^{'})$ of $G$ which is isomorphic to $H$ . In this case we say that $G$ is $H$ -…

On the power domination number of de Bruijn and Kautz digraphs

An algebraic approach to lifts of digraphs

From expanded digraphs to lifts of voltage digraphs and line digraphs

H-supermagic labelings for firecrackers, banana trees and flowers

$H$ -supermagic labelings for firecrackers, banana trees and flowers