Results 21 to 30 of about 738,356 (324)

Double Roman domination

open access: yesDiscrete Applied Mathematics, 2016
Teresa W Haynes, Stephen T Hedetniemi
exaly   +2 more sources

Degree equitable restrained double domination in graphs

open access: yesElectronic Journal of Graph Theory and Applications, 2021
A subset D ⊆ V(G) is called an equitable dominating set of a graph G if every vertex v ∈ V(G) \ D has a neighbor u ∈ D such that |dG(u)-dG(v)| ≤ 1. An equitable dominating set D is a degree equitable restrained double dominating set (DERD-dominating set)
Sunilkumar M Hosamani   +3 more
doaj   +1 more source

The case for epistocratic republicanism [PDF]

open access: yes, 2020
In recent years, the fortunes of democracy have waned both in theory and practice. This has added impetus not only to the republican case for strengthening democratic institutions but also to new anti-democratic thought.
Blunt, G. D.
core   +1 more source

$k$-Efficient partitions of graphs [PDF]

open access: yesCommunications in Combinatorics and Optimization, 2019
A set $S = \{u_1,u_2, \ldots, u_t\}$ of vertices of $G$ is an efficient dominating set if every vertex of $G$ is dominated exactly once by the vertices of $S$.
M. Chellali   +2 more
doaj   +1 more source

Dominating Sets and Domination Polynomials of Paths [PDF]

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2009
Let G = (V, E) be a simple graph. A set S⊆V is a dominating set of G, if every vertex in V\S is adjacent to at least one vertex in S. Let be the family of all dominating sets of a path Pn with cardinality i, and let . In this paper, we construct , and obtain a recursive formula for d(Pn, i).
Saeid Alikhani, Yee-Hock Peng
openaire   +2 more sources

Homes as ‘cages of violence’ during the COVID-19 pandemic: A pastoral care approach to the case of Botswana

open access: yesHTS Teologiese Studies/Theological Studies, 2022
Violence has become a common phenomenon that affects women and children, particularly during the coronavirus disease 2019 (COVID-19) pandemic. While the lockdown regulations were meant to save lives by preventing further spread of the virus, another ...
Tshenolo J. Madigele, Gift T. Baloyi
doaj   +1 more source

Further Results on the Total Roman Domination in Graphs

open access: yesMathematics, 2020
Let G be a graph without isolated vertices. A function f : V ( G ) → { 0 , 1 , 2 } is a total Roman dominating function on G if every vertex v ∈ V ( G ) for which f ( v ) = 0 is adjacent to at least one vertex u ...
Abel Cabrera Martínez   +2 more
doaj   +1 more source

Domination and Fractional Domination in Digraphs

open access: yesThe Electronic Journal of Combinatorics, 2018
In this paper, we investigate the relation between the (fractional) domination number of a digraph $G$ and the independence number of its underlying graph, denoted by $\alpha(G)$. More precisely, we prove that every digraph $G$ on $n$ vertices has fractional domination number at most $2\alpha(G)$ and domination number at most $2\alpha(G) \cdot \log{n}$.
Harutyunyan, Ararat   +3 more
openaire   +5 more sources

Domination Reliability [PDF]

open access: yesThe Electronic Journal of Combinatorics, 2012
In this paper, we propose a new network reliability measure for some particular kind of service networks, which we refer to as domination reliability. We relate this new reliability measure to the domination polynomial of a graph and the coverage probability of a hypergraph.
Klaus Dohmen, Peter Tittmann 0001
openaire   +3 more sources

EQUITABLE RINGS DOMINATION IN GRAPHS [PDF]

open access: yesJournal of Algebraic Systems
A dominating set $S$ of $G$ is an \textit{equitable dominating set} of $G$ if for every $v \in V(G) \setminus S$, there exists $u \in S$ such that $uv \in V(G)$ and $\displaystyle{\left|\deg(u) - \deg(v)\right| \leq 1.}$ A dominating set $S$ of $G$ is a \
Mark Caay
doaj   +1 more source

Home - About - Disclaimer - Privacy