Results 21 to 30 of about 306 (178)

Girth and treewidth

open access: yesJournal of Combinatorial Theory, Series B, 2005
Graphs of high girth have been much studied, especially in the context of the minimum vertex number of graphs of given girth and minimum degree. The authors study the treewidth \(\text{tw}(G)\) of a graph \(G\), giving a lower bound in terms of the girth \(g(G)\) and average degree \(d(G)\). They show that \[ \text{tw}(G)\geq c {1\over g(G)+1} (d(G)-1)^
Chandran, L., Subramanian, C.
openaire   +3 more sources

Patterns with Bounded Treewidth [PDF]

open access: yesInformation and Computation, 2012
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Daniel Reidenbach, Markus L. Schmid
openaire   +2 more sources

Treewidth of display graphs: bounds, brambles and applications

open access: yesJournal of Graph Algorithms and Applications, 2019
Phylogenetic trees and networks are leaf-labelled graphs used to model evolution. Display graphs are created by identifying common leaf labels in two or more phylogenetic trees or networks.
Remie Janssen   +4 more
doaj   +1 more source

Extension Complexity, MSO Logic, and Treewidth [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2020
We consider the convex hull $P_{\varphi}(G)$ of all satisfying assignments of a given MSO formula $\varphi$ on a given graph $G$. We show that there exists an extended formulation of the polytope $P_{\varphi}(G)$ that can be described by $f(|\varphi ...
Petr Kolman   +2 more
doaj   +1 more source

Nordhaus–Gaddum for treewidth [PDF]

open access: yesEuropean Journal of Combinatorics, 2012
We prove that for every graph $G$ with $n$ vertices, the treewidth of $G$ plus the treewidth of the complement of $G$ is at least $n-2$. This bound is tight.
Gwenaël Joret, David R. Wood
openaire   +2 more sources

Clique Transversal Variants on Graphs: A Parameterized-Complexity Perspective

open access: yesMathematics, 2023
The clique transversal problem and its variants have garnered significant attention in the last two decades due to their practical applications in communication networks, social-network theory and transceiver placement for cellular telephones.
Chuan-Min Lee
doaj   +1 more source

The Treewidth of Induced Graphs of Conditional Preference Networks Is Small

open access: yesInformation, 2016
Conditional preference networks (CP-nets) are recently an emerging topic as a graphical model for compactly representing ordinal conditional preference relations on multi-attribute domains.
Jie Liu, Jinglei Liu
doaj   +1 more source

Recent Advances in Positive-Instance Driven Graph Searching

open access: yesAlgorithms, 2022
Research on the similarity of a graph to being a tree—called the treewidth of the graph—has seen an enormous rise within the last decade, but a practically fast algorithm for this task has been discovered only recently by Tamaki (ESA 2017).
Max Bannach, Sebastian Berndt
doaj   +1 more source

Boxicity and treewidth

open access: yesJournal of Combinatorial Theory, Series B, 2007
25 ...
Chandran, LS, Sivadasan, N
openaire   +2 more sources

Metric Dimension Parameterized By Treewidth [PDF]

open access: yesAlgorithmica, 2021
AbstractA resolving set S of a graph G is a subset of its vertices such that no two vertices of G have the same distance vector to S. The Metric Dimension problem asks for a resolving set of minimum size, and in its decision form, a resolving set of size at most some specified integer.
Édouard Bonnet, Nidhi Purohit
openaire   +6 more sources

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