Results 251 to 260 of about 9,485,710 (280)

The Zero Forcing Number of Graphs [PDF]

open access: yesSIAM Journal on Discrete Mathematics, 2019
A subset S of initially infected vertices of a graph G is called zero forcing if we can infect the entire graph by iteratively applying the following process. At each step, any infected vertex which has a unique uninfected neighbor, infects this neighbor.
Thomas Kalinowski   +2 more
exaly   +6 more sources

All Graphs with a Failed Zero Forcing Number of Two [PDF]

open access: yesSymmetry, 2021
Given a graph G, the zero forcing number of G, Z(G), is the smallest cardinality of any set S of vertices on which repeated applications of the forcing rule results in all vertices being in S.
Karla Rubi   +3 more
exaly   +5 more sources

On graphs maximizing the zero forcing number

Discrete Applied Mathematics, 2023
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Shou-Jun Xu
exaly   +4 more sources

Some bounds on the zero forcing number of a graph

open access: yesDiscrete Applied Mathematics, 2018
A set $Z$ of vertices of a graph $G$ is a zero forcing set of $G$ if initially labeling all vertices in $Z$ with $1$ and all remaining vertices of $G$ with $0$, and then, iteratively and as long as possible, changing the label of some vertex $u$ from $0$ to $1$ if $u$ is the only neighbor with label $0$ of some vertex with label $1$, results in the ...
Dieter Rautenbach, Michael Gentner
exaly   +3 more sources

On Extremal Graphs for Zero Forcing Number

Graphs and Combinatorics, 2022
For a graph \(G\) with \(S\subseteq V(G)\), \(S\) is a zero forcing set of \(G\) if iteratively adding vertices to \(S\) from \(V(G)\setminus S\) that are the unique neighbor in \(V(G)\setminus S\) of some vertex in \(S\), results in the entire \(V(G)\) of \(G\).
Yi-Ping Liang, Jianxi Li, Shou-Jun Xu
openaire   +1 more source

Positive semidefinite zero forcing [PDF]

open access: yesLinear Algebra and Its Applications, 2013
The positive semidefinite zero forcing number Z+(G) of a graph G was introduced in [4]. We establish a variety of properties of Z+(G): Any vertex of G can be in a minimum positive semidefinite zero forcing set (this is not true for standard zero forcing).
Craig Erickson   +2 more
exaly   +1 more source

Extremal values and bounds for the zero forcing number

open access: yesDiscrete Applied Mathematics, 2016
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Uéverton S Souza   +2 more
exaly   +4 more sources

The Zero Forcing Number of Graphs with the Matching Number and the Cyclomatic Number

Graphs and Combinatorics, 2023
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Yu Jing, Wenqian Zhang, Shengjin Ji
openaire   +1 more source

Fractional zero forcing via three-color forcing games [PDF]

open access: yesDiscrete Applied Mathematics, 2016
An r-fold analogue of the positive semidefinite zero forcing process that is carried out on the r-blowup of a graph is introduced and used to define the fractional positive semidefinite forcing number.
David Robérson   +2 more
exaly   +1 more source

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