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Generalized Sum List Colorings of Graphs

open access: diamondDiscussiones Mathematicae Graph Theory, 2019
A (graph) property 𝒫 is a class of simple finite graphs closed under isomorphisms. In this paper we consider generalizations of sum list colorings of graphs with respect to properties 𝒫.
Kemnitz Arnfried   +2 more
doaj   +3 more sources

On List Equitable Total Colorings of the Generalized Theta Graph

open access: diamondDiscussiones Mathematicae Graph Theory, 2021
In 2003, Kostochka, Pelsmajer, and West introduced a list analogue of equitable coloring called equitable choosability. A k-assignment, L, for a graph G assigns a list, L(v), of k available colors to each v ∈ V (G), and an equitable L-coloring of G is a ...
Mudrock Jeffrey A.   +2 more
doaj   +2 more sources

An exact algorithm for the generalized list T-coloring problem [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2014
Discrete ...
Konstanty Junosza-Szaniawski   +1 more
doaj   +4 more sources

Sum List Edge Colorings of Graphs

open access: diamondDiscussiones Mathematicae Graph Theory, 2016
Let G = (V,E) be a simple graph and for every edge e ∈ E let L(e) be a set (list) of available colors. The graph G is called L-edge colorable if there is a proper edge coloring c of G with c(e) ∈ L(e) for all e ∈ E. A function f : E → ℕ is called an edge
Kemnitz Arnfried   +2 more
doaj   +2 more sources

Graph choosability and double list colorability [PDF]

open access: yesOpuscula Mathematica, 2010
In this paper, we give a sufficient condition for graph choosability, based on Combinatorial Nullstellensatz and a specific property, called "double list colorability", which means that there is a list assignment for which there are exactly two ...
Hamid-Reza Fanaï
doaj   +1 more source

Sufficient Conditions of 6-Cycles Make Planar Graphs DP-4-Colorable

open access: yesMathematics, 2022
In simple graphs, DP-coloring is a generalization of list coloring and thus many results of DP-coloring generalize those of list coloring. Xu and Wu proved that every planar graph without 5-cycles adjacent simultaneously to 3-cycles and 4-cycles is 4 ...
Kittikorn Nakprasit   +2 more
doaj   +1 more source

An improved upper bound for the dynamic list coloring of 1-planar graphs

open access: yesAIMS Mathematics, 2022
A graph is 1-planar if it can be drawn in the plane such that each of its edges is crossed at most once. A dynamic coloring of a graph G is a proper vertex coloring such that for each vertex of degree at least 2, its neighbors receive at least two ...
Xiaoxue Hu, Jiangxu Kong
doaj   +1 more source

Neighbor sum distinguishing total choice number of IC-planar graphs with restrictive conditions

open access: yesAIMS Mathematics, 2023
A neighbor sum distinguishing (NSD) total coloring $ \phi $ of $ G $ is a proper total coloring such that $ \sum_{z\in E_{G}(u)\cup\{u\}}\phi(z)\neq\sum_{z\in E_{G}(v)\cup\{v\}}\phi(z) $ for each edge $ uv\in E(G) $.
Fugang Chao , Donghan Zhang
doaj   +1 more source

Planar graphs with $\Delta \geq 7$ and no triangle adjacent to a $C_4$ are minimally edge and total choosable [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2016
For planar graphs, we consider the problems of list edge coloring and list total coloring. Edge coloring is the problem of coloring the edges while ensuring that two edges that are adjacent receive different colors.
Marthe Bonamy   +2 more
doaj   +1 more source

The structure and the list 3-dynamic coloring of outer-1-planar graphs [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2021
An outer-1-planar graph is a graph admitting a drawing in the plane so that all vertices appear in the outer region of the drawing and every edge crosses at most one other edge.
Yan Li, Xin Zhang
doaj   +1 more source

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