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Outer-independent total Roman domination in graphs

open access: yesDiscrete Applied Mathematics, 2019
Given a graph $G$ with vertex set $V$, a function $f:V\rightarrow \{0,1,2\}$ is an outer-independent total Roman dominating function on $G$ if \begin{itemize} \item every vertex $v\in V$ for which $f(v)=0$ is adjacent to at least one vertex $u\in V$ such that $f(u)=2$, \item every vertex $x\in V$ for which $f(x)\ge 1$ is adjacent to at least one vertex
Abel Cabrera Martínez   +2 more
openaire   +3 more sources

On the signed strong total Roman domination number of graphs

open access: diamondTamkang Journal of Mathematics, 2022
Let $G=(V,E)$ be a finite and simple graph of order $n$ and maximumdegree $\Delta$. A signed strong total Roman dominating function ona graph $G$ is a function $f:V(G)\rightarrow\{-1, 1,2,\ldots, \lceil\frac{\Delta}{2}\rceil+1\}$ satisfying the condition
A. Mahmoodi   +2 more
openalex   +3 more sources

Signed total double Roman dominating functions in graphs

open access: yesAKCE International Journal of Graphs and Combinatorics
A signed total double Roman dominating function (STDRDF) on an isolated-free graph [Formula: see text] is a function [Formula: see text] such that (i) every vertex v with [Formula: see text] has at least two neighbors assigned 2 under f or one neighbor w
L. Shahbazi   +2 more
doaj   +2 more sources

Several Roman domination graph invariants on Kneser graphs [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2023
This paper considers the following three Roman domination graph invariants on Kneser graphs: Roman domination, total Roman domination, and signed Roman domination.
Tatjana Zec, Milana Grbić
doaj   +1 more source

Total restrained Roman domination

open access: yes, 2022
Published by Azabaijan Shahid Madani University, Azarshahr ...
Amjadi, Jafar   +2 more
openaire   +3 more sources

Maximum Second Zagreb Index Of Trees With Given Roman Domination Number [PDF]

open access: yesTransactions on Combinatorics, 2023
Chemical study regarding total $\pi$-electron energy with respect to conjugated molecules has focused on the second Zagreb index of graphs. Moreover, in the last half-century, it has gotten a lot of attention.
Ayu Ameliatul Ahmad Jamri   +3 more
doaj   +1 more source

Domination parameters with number 2: Interrelations and algorithmic consequences [PDF]

open access: yes, 2018
In this paper, we study the most basic domination invariants in graphs, in which number 2 is intrinsic part of their definitions. We classify them upon three criteria, two of which give the following previously studied invariants: the weak 2-domination ...
Bonomo, Flavia   +4 more
core   +2 more sources

Dominating the Direct Product of Two Graphs through Total Roman Strategies

open access: yesMathematics, 2020
Given a graph G without isolated vertices, a total Roman dominating function for G is a function f:V(G)→{0,1,2} such that every vertex u with f(u)=0 is adjacent to a vertex v with f(v)=2, and the set of vertices with positive labels induces a graph of ...
Abel Cabrera Martínez   +3 more
doaj   +1 more source

Relativism and universalism in interrogation fairness: a comparative analysis between Europe and China [PDF]

open access: yes, 2012
This paper addresses Chinese interrogation rules from historical and comparative perspectives by relating them to the very different development of interrogation procedure in Europe.
Vander Beken, Tom, Wu, Wei
core   +2 more sources

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