Results 21 to 30 of about 69,865 (208)

Forbidden subgraph decomposition

open access: yesDiscrete Mathematics, 2002
no ...
Rusu, Irena, Spinrad, Jeremy P.
openaire   +2 more sources

On Minrank and Forbidden Subgraphs [PDF]

open access: yesACM Transactions on Computation Theory, 2019
The minrank over a field F of a graph G on the vertex set { 1,2,… , n } is the minimum possible rank of a matrix M ∈ F n × n such that M
openaire   +5 more sources

Upward-closed hereditary families in the dominance order [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2022
The majorization relation orders the degree sequences of simple graphs into posets called dominance orders. As shown by Ruch and Gutman (1979) and Merris (2002), the degree sequences of threshold and split graphs form upward-closed sets within the ...
Michael D. Barrus, Jean A. Guillaume
doaj   +1 more source

Forbidden subgraphs for chorded pancyclicity

open access: yesDiscrete Mathematics, 2017
We call a graph $G$ pancyclic if it contains at least one cycle of every possible length $m$, for $3\le m\le |V(G)|$. In this paper, we define a new property called chorded pancyclicity. We explore forbidden subgraphs in claw-free graphs sufficient to imply that the graph contains at least one chorded cycle of every possible length $4, 5, \ldots, |V(G)|
Megan Cream   +2 more
openaire   +4 more sources

The graph grabbing game on {0,1}-weighted graphs

open access: yesResults in Applied Mathematics, 2019
The graph grabbing game is a two-player game on a weighted connected graph in which two players, Alice and Bob, alternatively remove non-cut vertices one by one to gain the weights on them.
Soogang Eoh, Jihoon Choi
doaj   +1 more source

Complexity Framework For Forbidden Subgraphs.

open access: yesCoRR, 2022
For any finite set H={H1,…,Hp} of graphs, a graph is H-subgraph-free if it does not contain any of H1,…,Hp as a subgraph. Similar to known meta-classifications for the minor and topological minor relations, we give a meta-classification for the subgraph relation.
Matthew Johnson 0002   +6 more
openaire   +2 more sources

Hereditary Equality of Domination and Exponential Domination in Subcubic Graphs

open access: yesDiscussiones Mathematicae Graph Theory, 2021
Let γ(G) and γe(G) denote the domination number and exponential domination number of graph G, respectively. Henning et al., in [Hereditary equality of domination and exponential domination, Discuss. Math. Graph Theory 38 (2018) 275–285] gave a conjecture:
Chen Xue-Gang, Wang Yu-Feng, Wu Xiao-Fei
doaj   +1 more source

Colouring graphs with forbidden bipartite subgraphs

open access: yesCombinatorics, Probability and Computing, 2022
AbstractA conjecture of Alon, Krivelevich and Sudakov states that, for any graph $F$ , there is a constant $c_F \gt 0$ such that if $G$ is an $F$ -free graph of maximum degree $\Delta$ , then $\chi\!(G) \leqslant c_F \Delta/ \log\!\Delta$ . Alon, Krivelevich and Sudakov verified this conjecture for a class of graphs $F$ that includes all ...
James Anderson   +2 more
openaire   +4 more sources

Forbidden subgraphs in connected graphs

open access: yesTheoretical Computer Science, 2004
Given a set $ξ=\{H_1,H_2,...\}$ of connected non acyclic graphs, a $ξ$-free graph is one which does not contain any member of $% ξ$ as copy. Define the excess of a graph as the difference between its number of edges and its number of vertices. Let ${\gr{W}}_{k,ξ}$ be theexponential generating function (EGF for brief) of connected $ξ$-free graphs of ...
Ravelomanana, Vlady, Loÿs, Thimonier
openaire   +4 more sources

The structure of graphs with forbidden induced $C_4$, $\overline{C}_4$, $C_5$, $S_3$, chair and co-chair

open access: yesElectronic Journal of Graph Theory and Applications, 2018
We find the structure of graphs that have no C4, $\overline{C}_4$, C5, S3, chair and co-chair as induced subgraphs. Then we deduce the structure of the graphs having no induced C4, $\overline{C_4}$, S3, chair and co-chair and the structure of the graphs ...
Salman Ghazal
doaj   +1 more source

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