-Tuple Total Restrained Domination in Complementary Prisms
نویسندگان
چکیده
منابع مشابه
$k$-tuple total restrained domination/domatic in graphs
For any integer $kgeq 1$, a set $S$ of vertices in a graph $G=(V,E)$ is a $k$-tuple total dominating set of $G$ if any vertex of $G$ is adjacent to at least $k$ vertices in $S$, and any vertex of $V-S$ is adjacent to at least $k$ vertices in $V-S$. The minimum number of vertices of such a set in $G$ we call the $k$-tuple total restrained domination number of $G$. The maximum num...
متن کامل$k$-tuple total restrained domination/domatic in graphs
for any integer $kgeq 1$, a set $s$ of vertices in a graph $g=(v,e)$ is a $k$-tuple total dominating set of $g$ if any vertex of $g$ is adjacent to at least $k$ vertices in $s$, and any vertex of $v-s$ is adjacent to at least $k$ vertices in $v-s$. the minimum number of vertices of such a set in $g$ we call the $k$-tuple total restrained domination number of $g$. the maximum num...
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The complementary prism GG of a graph G is formed from the disjoint union of G and its complement G by adding the edges of a perfect matching between the corresponding vertices of G and G. A Roman dominating function on a graph G = (V,E) is a labeling f : V (G) → {0, 1, 2} such that every vertex with label 0 is adjacent to a vertex with label 2. The Roman domination number γR(G) ofG is the mini...
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Using hypergraph transversals it is proved that γt(Qn+1) = 2γ(Qn), where γt(G) and γ(G) denote the total domination number and the domination number of G, respectively, and Qn is the n-dimensional hypercube. More generally, it is shown that if G is a bipartite graph, then γt(G K2) = 2γ(G). Further, we show that the bipartiteness condition is essential by constructing, for any k > 1, a (non-bipa...
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Let G = (V,E) be a graph. A set S ⊆ V is a total restrained dominating set if every vertex is adjacent to a vertex in S and every vertex of V − S is adjacent to a vertex in V − S. The total restrained domination number of G, denoted by γtr(G), is the smallest cardinality of a total restrained dominating set of G. We show that if T is a tree of order n, then γtr(T ) ≥ d(n + 2)/2e. Moreover, we s...
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ژورنال
عنوان ژورنال: ISRN Combinatorics
سال: 2013
ISSN: 2090-8911
DOI: 10.1155/2013/984549