Recent Advances in Graph Theory with Applications

A special issue of Axioms (ISSN 2075-1680). This special issue belongs to the section "Mathematical Analysis".

Deadline for manuscript submissions: closed (30 September 2023) | Viewed by 9371

Special Issue Editors


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Guest Editor
School of Mathematics and Statistics, Beijing Key Laboratory on MCAACI, Beijing Institute of Technology, Beijing 100081, China
Interests: graph theory with structure analysis; graph factor; graph operation; Hamiltonian properties of graphs; iterated line graphs; Hamiltonian index

E-Mail Website
Guest Editor
School of Mathematics and Statistics, Beijing Institute of Technology, Beijing 100081, China
Interests: structural graph theory; cycle covers; integer flows; signed graphs

Special Issue Information

Dear Colleagues,

Graph theory originates from the problem that appeared when Leonhard Eulerian resolved the Königsberg seven bridges problem. The easily described 4-color planar graph problem has also contributed to the prominence of graph theory. As people may use computers to resolve graph theory problem in itself, graph theory now plays many different roles and is increasingly becoming included in various mathematics tools with numerous applications. Many graph theory problems appear as either real or theoretical problems.

We would like to invite you submit an article on your recent research in the area of graph theory along with its application to our Special Issue “Recent Advances in Graph Theory with Applications”. Specific topics of interest include but are not limited to the following: graph structure, factor, color, extremal graph theory, graph algorithms, random graph theory, and hypergraphs. We welcome submissions related to all aspects of graph theory and its applications that present new results on theory and applications.

Prof. Dr. Liming Xiong
Dr. Zhang Zhang
Guest Editors

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Keywords

  • graph theory
  • applications of graphs
  • graph factor
  • graph colors
  • connectivity
  • Hamiltonian graphs
  • hypergraph
  • graph indices
  • matching problem
  • NP-hard problems in graphs
  • planar graphs
  • random graphs

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Published Papers (6 papers)

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Research

19 pages, 347 KiB  
Article
Neighbor Distinguishing Colorings of Graphs with the Restriction for Maximum Average Degree
by Jingjing Huo, Sensen Wen, Yulong Chen and Mingchao Li
Axioms 2023, 12(12), 1132; https://doi.org/10.3390/axioms12121132 - 18 Dec 2023
Viewed by 1181
Abstract
Neighbor distinguishing colorings of graphs represent powerful tools for solving the channel assignment problem in wireless communication networks. They consist of two forms of coloring: neighbor distinguishing edge coloring, and neighbor distinguishing total coloring. The neighbor distinguishing edge (total) coloring of a graph [...] Read more.
Neighbor distinguishing colorings of graphs represent powerful tools for solving the channel assignment problem in wireless communication networks. They consist of two forms of coloring: neighbor distinguishing edge coloring, and neighbor distinguishing total coloring. The neighbor distinguishing edge (total) coloring of a graph G is an edge (total) coloring with the requirement that each pair of adjacent vertices contains different color sets. The neighbor distinguishing edge (total) chromatic number of G is the smallest integer k in cases where a neighbor distinguishing edge (total) coloring exists through the use of k colors in G. The maximum average degree of G is the maximum of the average degree of its non-empty subgraphs. In this paper, we characterize the neighbor distinguishing edge (total) chromatic numbers of graphs with a maximum average degree less than four by means of the discharging method. Full article
(This article belongs to the Special Issue Recent Advances in Graph Theory with Applications)
17 pages, 311 KiB  
Article
Analysis of the Zagreb Indices over the Weakly Zero-Divisor Graph of the Ring Zp×Zt×Zs
by Nadeem ur Rehman, Amal S. Alali, Shabir Ahmad Mir and Mohd Nazim
Axioms 2023, 12(10), 987; https://doi.org/10.3390/axioms12100987 - 18 Oct 2023
Viewed by 1338
Abstract
Let R be a commutative ring with identity, and Z(R) be the set of zero-divisors of R. The weakly zero-divisor graph of R denoted by WΓ(R) is an undirected (simple) graph with vertex set  [...] Read more.
Let R be a commutative ring with identity, and Z(R) be the set of zero-divisors of R. The weakly zero-divisor graph of R denoted by WΓ(R) is an undirected (simple) graph with vertex set Z(R)*, and two distinct vertices x and y are adjacent, if and only if there exist rann(x) and sann(y), such that rs=0. Importantly, it is worth noting that WΓ(R) contains the zero-divisor graph Γ(R) as a subgraph. It is known that graph theory applications play crucial roles in different areas one of which is chemical graph theory that deals with the applications of graph theory to solve molecular problems. Analyzing Zagreb indices in chemical graph theory provides numerical descriptors for molecular structures, aiding in property prediction and drug design. These indices find applications in QSAR modeling and chemical informatics, contributing to efficient compound screening and optimization. They are essential tools for advancing pharmaceutical and material science research. This research article focuses on the basic properties of the weakly zero-divisor graph of the ring Zp×Zt×Zs, denoted by WΓ(Zp×Zt×Zs), where p, t, and s are prime numbers that may not necessarily be distinct and greater than 2. Moreover, this study includes the examination of various indices and coindices such as the first and second Zagreb indices and coindices, as well as the first and second multiplicative Zagreb indices and coindices of WΓ(Zp×Zt×Zs). Full article
(This article belongs to the Special Issue Recent Advances in Graph Theory with Applications)
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11 pages, 354 KiB  
Article
Equitable Coloring of IC-Planar Graphs with Girth g ≥ 7
by Danjun Huang and Xianxi Wu
Axioms 2023, 12(9), 822; https://doi.org/10.3390/axioms12090822 - 26 Aug 2023
Viewed by 988
Abstract
An equitable k-coloring of a graph G is a proper vertex coloring such that the size of any two color classes differ at most 1. If there is an equitable k-coloring of G, then the graph G is said to [...] Read more.
An equitable k-coloring of a graph G is a proper vertex coloring such that the size of any two color classes differ at most 1. If there is an equitable k-coloring of G, then the graph G is said to be equitably k-colorable. A 1-planar graph is a graph that can be embedded in the Euclidean plane such that each edge can be crossed by other edges at most once. An IC-planar graph is a 1-planar graph with distinct end vertices of any two crossings. In this paper, we will prove that every IC-planar graph with girth g7 is equitably Δ(G)-colorable, where Δ(G) is the maximum degree of G. Full article
(This article belongs to the Special Issue Recent Advances in Graph Theory with Applications)
12 pages, 364 KiB  
Article
An Approximation Algorithm for a Variant of Dominating Set Problem
by Limin Wang and Wenqi Wang
Axioms 2023, 12(6), 506; https://doi.org/10.3390/axioms12060506 - 23 May 2023
Cited by 1 | Viewed by 1660
Abstract
In this paper, we consider a variant of dominating set problem, i.e., the total dominating set problem. Given an undirected graph G=(V,E), a subset of vertices TV is called a total dominating set if [...] Read more.
In this paper, we consider a variant of dominating set problem, i.e., the total dominating set problem. Given an undirected graph G=(V,E), a subset of vertices TV is called a total dominating set if every vertex in V is adjacent to at least one vertex in T. Based on LP relaxation techniques, this paper gives a distributed approximation algorithm for the total dominating set problem in general graphs. The presented algorithm obtains a fractional total dominating set that is, at most, k(1+Δ1k)Δ1k times the size of the optimal solution to this problem, where k is a positive integer and Δ is the maximum degree of G. The running time of this algorithm is constant communication rounds under the assumption of a synchronous communication model. Full article
(This article belongs to the Special Issue Recent Advances in Graph Theory with Applications)
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25 pages, 467 KiB  
Article
Spanning k-Ended Tree in 2-Connected Graph
by Wanpeng Lei and Jun Yin
Axioms 2023, 12(5), 411; https://doi.org/10.3390/axioms12050411 - 23 Apr 2023
Viewed by 1059
Abstract
Win proved a very famous conclusion that states the graph G with connectivity κ(G), independence number α(G) and α(G)κ(G)+k1(k2) [...] Read more.
Win proved a very famous conclusion that states the graph G with connectivity κ(G), independence number α(G) and α(G)κ(G)+k1(k2) contains a spanning k-ended tree. This means that there exists a spanning tree with at most k leaves. In this paper, we strengthen the Win theorem to the following: Let G be a simple 2-connected graph such that |V(G)|2κ(G)+k, α(G)κ(G)+k(k2) and the number of maximum independent sets of cardinality κ+k is at most n2κk+1. Then, either G contains a spanning k-ended tree or a subgraph of Kκ((k+κ1)K1Kn2κk+1). Full article
(This article belongs to the Special Issue Recent Advances in Graph Theory with Applications)
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13 pages, 283 KiB  
Article
A Complete Characterization of Bipartite Graphs with Given Diameter in Terms of the Inverse Sum Indeg Index
by Guifu Su, Guanbang Song, Junfeng Du, Weixing Yang, Gang Rao and Jun Yin
Axioms 2022, 11(12), 691; https://doi.org/10.3390/axioms11120691 - 2 Dec 2022
Viewed by 1406
Abstract
In 2010, Vukičević introduced an new graph invariant, the inverse sum indeg index of a graph, which has been studied due to its wide range of applications. Let Bnd be the class of bipartite graphs of order n and diameter d [...] Read more.
In 2010, Vukičević introduced an new graph invariant, the inverse sum indeg index of a graph, which has been studied due to its wide range of applications. Let Bnd be the class of bipartite graphs of order n and diameter d. In this paper, we mainly characterize the bipartite graphs in Bnd with the maximal inverse sum indeg index. Bipartite graphs with the largest, second-largest, and smallest inverse sum indeg indexes are also completely characterized. Full article
(This article belongs to the Special Issue Recent Advances in Graph Theory with Applications)
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