Results 111 to 120 of about 886,125 (210)

Unsplittable Multicommodity Flows in Outerplanar Graphs

open access: yes
Full version of IPCO 2025 ...
David Alemán-Espinosa, Nikhil Kumar
openaire   +2 more sources

Horizontal visibility graph of a random restricted growth sequence. [PDF]

open access: yesAdv Appl Math, 2021
Mansour T, Rastegar R, Roitershtein A.
europepmc   +1 more source

Chromatic Sums for Colorings Avoiding Monochromatic Subgraphs

open access: yesDiscussiones Mathematicae Graph Theory, 2015
Given graphs G and H, a vertex coloring c : V (G) →ℕ is an H-free coloring of G if no color class contains a subgraph isomorphic to H. The H-free chromatic number of G, χ (H,G), is the minimum number of colors in an H-free coloring of G.
Kubicka Ewa   +2 more
doaj   +1 more source

Clustering systems of phylogenetic networks. [PDF]

open access: yesTheory Biosci, 2023
Hellmuth M, Schaller D, Stadler PF.
europepmc   +1 more source

A study of upper ideal relation graphs of rings

open access: yesAKCE International Journal of Graphs and Combinatorics
Let R be a ring with unity. The upper ideal relation graph [Formula: see text] of the ring R is the simple undirected graph whose vertex set is the set of all non-unit elements of R and two distinct vertices x, y are adjacent if and only if there exists ...
Barkha Baloda   +2 more
doaj   +1 more source

Improved Outerplanarity Bounds for Planar Graphs

open access: yes
In this paper, we study the outerplanarity of planar graphs, i.e., the number of times that we must (in a planar embedding that we can initially freely choose) remove the outerface vertices until the graph is empty. It is well-known that there are $n$-vertex graphs with outerplanarity $\tfrac{n}{6}+Θ(1)$, and not difficult to show that the ...
Biedl, Therese, Mondal, Debajyoti
openaire   +2 more sources

Light graphs in families of outerplanar graphs

open access: yesDiscrete Mathematics, 2007
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +1 more source

FOG: Finding outerplanar graphs

open access: yes, 2006
In this demo we will present FOG, a system that mines frequent outerplanar graphs. We argue that outerplanar graphs are an interesting class as they can be mined efficiently and are practically relevant for chemical applications. Our system provides several features that allow a user to ask detailed mining questions and visualize the fragments found.
Ramon, Jan   +3 more
openaire   +1 more source

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