Results 41 to 50 of about 142,988 (312)

04221 Abstracts Collection – Robust and Approximative Algorithms on Particular Graph Classes [PDF]

open access: yes, 2005
From 23.05.04 to 28.05.04, the Dagstuhl Seminar 04221 ``Robust and Approximative Algorithms on Particular Graph Classes'' was held in the International Conference and Research Center (IBFI), Schloss Dagstuhl.
Spinrad, Jeremy P.   +3 more
core   +1 more source

Simpler and Unified Recognition Algorithm for Path Graphs and Directed Path Graphs [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science
A path graph is the intersection graph of paths in a tree. A directed path graph is the intersection graph of paths in a directed tree. Even if path graphs and directed path graphs are characterized very similarly, their recognition algorithms differ ...
Lorenzo Balzotti
doaj   +1 more source

Labeling, Covering and Decomposing of Graphs — Smarandache’s Notion in Graph Theory [PDF]

open access: yes, 2010
This paper surveys the applications of Smarandache’s notion to graph theory appeared in International J.Math.Combin. from Vol.1,2008 to Vol.3,2009.
Mao, Linfan, Linfan Mao
core   +1 more source

Tractabilities and Intractabilities on Geometric Intersection Graphs

open access: yesAlgorithms, 2013
A graph is said to be an intersection graph if there is a set of objects such that each vertex corresponds to an object and two vertices are adjacent if and only if the corresponding objects have a nonempty intersection.
Ryuhei Uehara
doaj   +1 more source

07211 Abstracts Collection – Exact, Approximative, Robust and Certifying Algorithms on Particular Graph Classes [PDF]

open access: yes, 2007
From May 20 to May 25, 2007, the Dagstuhl Seminar 07211 ``Exact, Approximative, Robust and Certifying Algorithms on Particular Graph Classes'' was held in the International Conference and Research Center (IBFI), Schloss Dagstuhl.
Spinrad, Jeremy P.   +3 more
core   +1 more source

Class one graphs

open access: yesJournal of Combinatorial Theory, Series B, 1988
Let be \(G=(V,E)\) be a simple graph and its core B is defined to be the subgraph of G induced by the vertices of maximum degree. In the present paper are given conditions on B which are sufficient for G to be class 1. First is introduced an edge-queue of G which is a sequence of all edges \(e\in E(G)\) with certain properties.
Dean G. Hoffman, Christopher A. Rodger
openaire   +1 more source

Monadic second-order definable graph orderings [PDF]

open access: yesLogical Methods in Computer Science, 2014
We study the question of whether, for a given class of finite graphs, one can define, for each graph of the class, a linear ordering in monadic second-order logic, possibly with the help of monadic parameters.
Achim Blumensath, Bruno Courcelle
doaj   +1 more source

ODD HARMONIOUS LABELING ON SOME STRING GRAPH CLASSES

open access: yesBarekeng, 2022
A graph with the labeling properties of odd harmonic is called an odd harmonious graph. The purpose of this research was to get labeling properties of odd harmonic on the class of string graphs. The research used was a qualitative research method.
Fery Firmansah
doaj   +1 more source

Perfect Roman Domination: Aspects of Enumeration and Parameterization

open access: yesAlgorithms
Perfect Roman Dominating Functions and Unique Response Roman Dominating Functions are two ways to translate perfect code into the framework of Roman Dominating Functions.
Kevin Mann, Henning Fernau
doaj   +1 more source

Substitution-closed pattern classes

open access: yes, 2011
The substitution closure of a pattern class is the class of all permutations obtained by repeated substitution. The principal pattern classes (those defined by a single restriction) whose substitution closure can be defined by a finite number of ...
Atkinson, M.D.   +7 more
core   +1 more source

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