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author:

Hou, Jianfeng (Hou, Jianfeng.) [1] (Scholars:侯建锋) | Zhu, Hongguo (Zhu, Hongguo.) [2]

Indexed by:

EI Scopus SCIE

Abstract:

For a graph G and two positive integers t, r, a (t, t + r)-list assignment of G is a function L that assigns a set of permissible colors L(u) to every vertex u such that |L(u) | >= t and |L(u) u L(w) | >= t + r when uw is an edge. The graph G is said to be (t, t + r)-choosable if G allows a proper coloring psi satisfying psi (u) E L(u) for each u E V (G ) and each (t, t + r)-list assignment L of G . In this paper, we consider the (2, 2 + r)-choosability of planar graphs without short cycles. We show that: (1) if G is a planar graph contains no cycles of length 4, then G is (2,9)-choosable; (2) if G is a planar graph contains no cycles of lengths 4 and 5, then G is (2,7)-choosable.(c) 2022 Elsevier Inc. All rights reserved.

Keyword:

Choosability C k-free Discharging Planar graphs

Community:

  • [ 1 ] [Hou, Jianfeng]Fuzhou Univ, Ctr Discrete Math, Fuzhou 350003, Fujian, Peoples R China
  • [ 2 ] [Zhu, Hongguo]Zhejiang Normal Univ, Dept Math, Jinhua 321004, Zhejiang, Peoples R China

Reprint 's Address:

  • [Zhu, Hongguo]Zhejiang Normal Univ, Dept Math, Jinhua 321004, Zhejiang, Peoples R China;;

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Source :

APPLIED MATHEMATICS AND COMPUTATION

ISSN: 0096-3003

Year: 2023

Volume: 444

3 . 5

JCR@2023

3 . 5 0 0

JCR@2023

ESI Discipline: MATHEMATICS;

ESI HC Threshold:13

JCR Journal Grade:1

CAS Journal Grade:2

Cited Count:

WoS CC Cited Count: 0

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

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