Results 21 to 30 of about 121,460 (194)

A Note on the PageRank of Undirected Graphs [PDF]

open access: yes, 2012
The PageRank is a widely used scoring function of networks in general and of the World Wide Web graph in particular. The PageRank is defined for directed graphs, but in some special cases applications for undirected graphs occur.
Abbassi   +14 more
core   +1 more source

Quantitation of Vascular Morphology by Directed Graph Construction

open access: yesIEEE Access, 2019
The quantitation of morphology information of X-ray angiography image has an important value in the diagnosis of coronary artery disease. This paper proposes an automatic morphology estimation method by using directed graph construction for X-ray ...
Jingliang Zhao   +5 more
doaj   +1 more source

The Wiener, hyper-Wiener, Harary and SK indices of the P(Z_{p^k.q^r}) power graph [PDF]

open access: yesNotes on Number Theory and Discrete Mathematics, 2023
The undirected P(Zₙ) power graph of a finite group of Zₙ is a connected graph, the set of vertices of which is Zₙ. Here u,v∈P(Zₙ) are two diverse adjacent vertices if and only if u≠v and ⟨v⟩ ⊆ ⟨u⟩ or ⟨u⟩ ⊆ ⟨v⟩.
Volkan Aşkin
doaj   +1 more source

Iterative Algorithm for Finding the Shortest Ways in an Unweighted Undirected Graph

open access: yesСовременные информационные технологии и IT-образование, 2021
There is a problem of finding the shortest paths between two vertices in an unweighted, undirected graph, which is aggravated by the fact that the available algorithms for finding all paths have a complexity of at least .
Valentin Sysoev
doaj   +1 more source

Lucas Gracefulness of Almost and Nearly for Some Graphs [PDF]

open access: yes, 2011
By a graph, we mean a finite undirected graph without loops or multiple ...
Nagarajan, A.   +2 more
core   +1 more source

Compression schemes for concept classes induced by three types of discrete undirected graphical models

open access: yesStatistical Theory and Related Fields, 2023
Sample compression schemes were first proposed by Littlestone and Warmuth in 1986. Undirected graphical model is a powerful tool for classification in statistical learning.
Tingting Luo, Benchong Li
doaj   +1 more source

Evolutionary regime transitions in structured populations. [PDF]

open access: yesPLoS ONE, 2018
The evolutionary dynamics of a finite population where resident individuals are replaced by mutant ones depends on its spatial structure. Usually, the population adopts the form of an undirected graph where the place occupied by each individual is ...
Fernando Alcalde Cuesta   +2 more
doaj   +1 more source

Simple Undirected Graphs as Formal Contexts [PDF]

open access: yes, 2015
The adjacency matrix of a graph is interpreted as a formal context. Then, the counterpart of Formal Concept Analysis (FCA) tools are introduced in graph theory. Moreover, a formal context is seen as a Boolean information table, the structure at the basis of Rough Set Theory (RST). Hence, we also apply RST tools to graphs.
Giampiero Chiaselotti   +2 more
openaire   +2 more sources

Enumerating Cyclic Orientations of a Graph [PDF]

open access: yes, 2015
Acyclic and cyclic orientations of an undirected graph have been widely studied for their importance: an orientation is acyclic if it assigns a direction to each edge so as to obtain a directed acyclic graph (DAG) with the same vertex set; it is cyclic ...
A Itai   +11 more
core   +4 more sources

Reputation games for undirected graphs

open access: yesDiscrete Applied Mathematics, 2014
J. Hopcroft and D. Sheldon originally introduced network reputation games to investigate the self-interested behavior of web authors who want to maximize their PageRank on a directed web graph by choosing their outlinks in a game theoretic manner. They give best response strategies for each player and characterize properties of web graphs which are ...
Avis, David, Iwama, Kazuo, Paku, Daichi
openaire   +2 more sources

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