Results 1 to 10 of about 2,481 (263)

Graph isomorphism completeness for chordal bipartite graphs and strongly chordal graphs [PDF]

open access: yesDiscrete Applied Mathematics, 2005
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Ryuhei Uehara
exaly   +3 more sources

Connected graph searching in chordal graphs

open access: yesDiscrete Applied Mathematics, 2009
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Nicolas Nisse
exaly   +3 more sources

Edge erasures and chordal graphs [PDF]

open access: yesElectronic Journal of Graph Theory and Applications, 2021
We prove several results about chordal graphs and weighted chordal graphs by focusing on exposed edges. These are edges that are properly contained in a single maximal complete subgraph.
Jared Culbertson   +2 more
doaj   +3 more sources

The Neighborhood Polynomial of Chordal Graphs [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2022
We study the neighborhood polynomial and the complexity of its computation for chordal graphs. The neighborhood polynomial of a graph is the generating function of subsets of its vertices that have a common neighbor.
Helena Bergold   +2 more
doaj   +1 more source

Properties and Recognition of Atom Graphs

open access: yesAlgorithms, 2022
The atom graph of a connected graph is a graph whose vertices are the atoms obtained by clique minimal separator decomposition of this graph, and whose edges are the edges of all its atom trees.
Geneviève Simonet, Anne Berry
doaj   +1 more source

On chordal phylogeny graphs [PDF]

open access: yesDiscrete Applied Mathematics, 2021
An acyclic digraph each vertex of which has indegree at most $i$ and outdegree at most $j$ is called an $(i, j)$ digraph for some positive integers $i$ and $j$. Lee {\it et al.} (2017) studied the phylogeny graphs of $(2, 2)$ digraphs and gave sufficient conditions and necessary conditions for $(2, 2)$ digraphs having chordal phylogeny graphs.
Soogang Eoh, Suh-Ryung Kim
openaire   +2 more sources

Axiomatic characterizations of Ptolemaic and chordal graphs [PDF]

open access: yesOpuscula Mathematica, 2023
The interval function and the induced path function are two well studied class of set functions of a connected graph having interesting properties and applications to convexity, metric graph theory. Both these functions can be framed as special instances
Manoj Changat   +2 more
doaj   +1 more source

Further results on Hendry's Conjecture [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2022
Recently, a conjecture due to Hendry was disproved which stated that every Hamiltonian chordal graph is cycle extendible. Here we further explore the conjecture, showing that it fails to hold even when a number of extra conditions are imposed.
Manuel Lafond   +2 more
doaj   +1 more source

Hyperbolicity and Chordality of a Graph [PDF]

open access: yesThe Electronic Journal of Combinatorics, 2011
Let $G$ be a connected graph with the usual shortest-path metric $d$. The graph $G$ is $\delta$-hyperbolic provided for any vertices $x,y,u,v$ in it, the two larger of the three sums $d(u,v)+d(x,y),d(u,x)+d(v,y)$ and $d(u,y)+d(v,x)$ differ by at most $2\delta.$ The graph $G$ is $k$-chordal provided it has no induced cycle of length greater than $k ...
Yaokun Wu, Chengpeng Zhang
openaire   +2 more sources

A Short Proof of the Size of Edge-Extremal Chordal Graphs

open access: yesJournal of Mathematical Sciences and Modelling, 2022
[3] have recently determined the maximum number of edges of a chordal graph with a maximum degree less than $d$ and the matching number at most $\nu$ by exhibiting a family of chordal graphs achieving this bound. We provide simple proof of their result.
Mordechai Shalom
doaj   +1 more source

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