Search Results - "Wenger, Paul S"
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Colored Saturation Parameters for Rainbow Subgraphs
Published in Journal of graph theory (01-12-2017)“…Inspired by a 1987 result of Hanson and Toft [Edge‐colored saturated graphs, J Graph Theory 11 (1987), 191–196] and several recent results, we consider the…”
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Saturation Numbers in Tripartite Graphs
Published in Journal of graph theory (01-04-2017)“…Given graphs H and F, a subgraph G⊆H is an F‐saturated subgraph of H if F⊈G, but F⊆G+e for all e∈E(H)∖E(G). The saturation number of F in H, denoted sat (H,F),…”
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3
Planar Digraphs without Large Acyclic Sets
Published in Journal of graph theory (01-05-2017)“…Given a directed graph, an acyclic set is a set of vertices inducing a directed subgraph with no directed cycle. In this note, we show that for all integers…”
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The list Distinguishing Number Equals the Distinguishing Number for Interval Graphs
Published in Discussiones Mathematicae. Graph Theory (01-02-2017)“…A of a graph is a coloring of the vertices so that every nontrivial automorphism of maps some vertex to a vertex with a different color. The of is the minimum…”
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Uniquely Cycle‐Saturated Graphs
Published in Journal of graph theory (01-05-2017)“…Given a graph F, a graph G is uniquely F‐saturated if F is not a subgraph of G and adding any edge of the complement to G completes exactly one copy of F. In…”
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On the sum necessary to ensure that a degree sequence is potentially H-graphic
Published in Combinatorica (Budapest. 1981) (01-12-2016)“…Given a graph H , a graphic sequence π is potentially H-graphic if there is some realization of π that contains H as a subgraph. In 1991, Erdős, Jacobson and…”
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7
List distinguishing parameters of trees
Published in Discrete Applied Mathematics (01-04-2013)“…A coloring of the vertices of a graph G is said to be distinguishing provided no nontrivial automorphism of G preserves all of the vertex colors. The…”
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8
Fractional acquisition in graphs
Published in Discrete Applied Mathematics (11-12-2014)“…Let G be a vertex-weighted graph in which each vertex has weight 1. Given a vertex u with positive weight and a neighbor v whose weight is at least the weight…”
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A note on the saturation number of the family of k-connected graphs
Published in Discrete mathematics (28-05-2014)“…Given a family of graphs F, a graph G is F-saturated if no member of F is a subgraph of G, but for all e∈E(G¯), some member of F is a subgraph of G+e. The…”
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10
Unit Hypercube Visibility Numbers of Trees
Published in Graphs and combinatorics (01-07-2017)“…A visibility representation of a graph G is an assignment of the vertices of G to geometric objects such that vertices are adjacent if and only if their…”
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11
The Unit Bar Visibility Number of a Graph
Published in Journal of graph algorithms and applications (01-04-2016)“…A $t$-unit-bar representation of a graph $G$ is an assignment of sets of at most $t$ horizontal unit-length segments in the plane to the vertices of $G$ so…”
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12
Saturation numbers for families of graph subdivisions
Published in Journal of graph theory (01-12-2012)“…For a family F of graphs, a graph G is F‐saturated if G contains no member of F as a subgraph, but for any edge uv in G¯, G+uv contains some member of F as a…”
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13
Uniquely C 4-Saturated Graphs
Published in Graphs and combinatorics (01-03-2012)Get full text
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Uniquely C ^sub 4^-Saturated Graphs
Published in Graphs and combinatorics (01-03-2012)“…For a fixed graph H, a graph G is uniquely H-saturated if G does not contain H, but the addition of any edge from G to G completes exactly one copy of H. Using…”
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Uniquely C sub(4)-Saturated Graphs
Published in Graphs and combinatorics (01-03-2012)“…For a fixed graph H, a graph G is uniquely H-saturated if G does not contain H, but the addition of any edge from G [macr] to G completes exactly one copy of…”
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16
Uniquely C4-Saturated Graphs
Published in Graphs and combinatorics (2012)“…For a fixed graph H , a graph G is uniquely H-saturated if G does not contain H , but the addition of any edge from to G completes exactly one copy of H …”
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17
Unit Hypercube Visibility Numbers of Trees
Published 04-09-2016“…A visibility representation of a graph $G$ is an assignment of the vertices of $G$ to geometric objects such that vertices are adjacent if and only if their…”
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18
The List Distinguishing Number Equals the Distinguishing Number for Interval Graphs
Published 14-09-2015“…A \textit{distinguishing coloring} of a graph $G$ is a coloring of the vertices so that every nontrivial automorphism of $G$ maps some vertex to a vertex with…”
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19
Saturation numbers in tripartite graphs
Published 25-08-2014“…Given graphs $H$ and $F$, a subgraph $G\subseteq H$ is an $F$-saturated subgraph of $H$ if $F\nsubseteq G$, but $F\subseteq G+e$ for all $e\in E(H)\setminus…”
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20
The Unit Acquisition Number of a Graph
Published 07-11-2017“…Let $G$ be a graph with nonnegative integer weights. A {\it unit acquisition move} transfers one unit of weight from a vertex to a neighbor that has at least…”
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