Results 21 to 30 of about 3,671,469 (355)

Classes of graphs with restricted interval models [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 1999
We introduce q-proper interval graphs as interval graphs with interval models in which no interval is properly contained in more than q other intervals, and also provide a forbidden induced subgraph characterization of this class of graphs.
Andrzej Proskurowski, Jan Arne Telle
doaj   +2 more sources

Energy and Spectrum Analysis of Interval Valued Neutrosophic Graph using MATLAB [PDF]

open access: yesNeutrosophic Sets and Systems, 2019
In recent time graphical analytics of uncertainty and indeterminacy has become major concern for data analytics researchers. In this direction, the mathematical algebra of neutrosophic graph is extended to interval-valued neutrosophic graph.
Said Broumi   +4 more
doaj   +1 more source

On central max-point-tolerance graphs

open access: yesAKCE International Journal of Graphs and Combinatorics, 2020
Max-point-tolerance graphs (MPTG) were studied by Catanzaro et al. in 2017 and the same class of graphs were introduced in the name of p-BOX(1) graphs by Soto and Caro in 2015.
Sanchita Paul
doaj   +1 more source

An Extension of Fuzzy Competition Graph and Its Uses in Manufacturing Industries

open access: yesMathematics, 2020
Competition graph is a graph which constitutes from a directed graph (digraph) with an edge between two vertices if they have some common preys in the digraph.
Tarasankar Pramanik   +3 more
doaj   +1 more source

The power of interval models for computing graph centralities [PDF]

open access: yesRevista Română de Informatică și Automatică, 2022
Food webs, some scheduling problems and DNA molecules all have in common a “linear structure” which can be captured through the idealized model of interval graphs (intersection graphs of intervals on a line).
Guillaume DUCOFFE
doaj   +1 more source

Extremal Values of the Interval Number of a Graph [PDF]

open access: yes, 1980
The interval number $i( G )$ of a simple graph $G$ is the smallest number $t$ such that to each vertex in $G$ there can be assigned a collection of at most $t$ finite closed intervals on the real line so that there is an edge between vertices $v$ and $w$
B. West, Douglas, Jerrold R. Griggs
core   +1 more source

Algorithms for optimal min hop and foremost paths in interval temporal graphs

open access: yesApplied Network Science, 2022
Path problems are fundamental to the study of graphs. Temporal graphs are graphs in which the edges connecting the vertices change with time. Min hop paths problem in a temporal graph is the problem of finding time respecting paths from source vertex to ...
Anuj Jain, Sartaj K. Sahni
doaj   +1 more source

OBDD-Based Representation of Interval Graphs [PDF]

open access: yes, 2013
A graph $G = (V,E)$ can be described by the characteristic function of the edge set $\chi_E$ which maps a pair of binary encoded nodes to 1 iff the nodes are adjacent. Using \emph{Ordered Binary Decision Diagrams} (OBDDs) to store $\chi_E$ can lead to a (
B. Bollig   +22 more
core   +1 more source

Counting interval graphs [PDF]

open access: yesTransactions of the American Mathematical Society, 1982
In this paper we enumerate interval graphs (up to isomorphism) along with labelled interval graphs, identity interval graphs, transitive interval graphs and various sorts of unit interval graphs. The enumeration makes use of a structural decomposition of interval graphs which leads to a characterization of those interval graphs having a unique interval
openaire   +2 more sources

The Phylogeny Graphs of Doubly Partial Orders

open access: yesDiscussiones Mathematicae Graph Theory, 2013
The competition graph of a doubly partial order is known to be an interval graph. The CCE graph and the niche graph of a doubly partial order are also known to be interval graphs if the graphs do not contain a cycle of length four and three as an induced
Park Boram, Sano Yoshio
doaj   +1 more source

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