Analyzing (n, m)-Chromatic Numbers of Graphs with Bounded Sparsity Parameters

Centrala begrepp

The author explores the relationship between (n, m)-chromatic numbers and sparsity parameters in graphs, revealing new insights and bounds.

Sammanfattning

The content delves into (n, m)-graphs' chromatic numbers and their connections to sparsity parameters. It discusses homomorphisms, acyclic chromatic numbers, and planar graphs. Theorems are proven regarding arboricity, acyclic chromatic numbers, and partial 2-trees. The study provides valuable insights into graph theory concepts.

Statistik

For every positive integer k ≥ 2 and r ≥ 2, there exists an (n, m)-graph Gk having arb(und(Gk)) ≤ r and χn,m(Gk) ≥ k.
Let G be a graph with mad(G) < 2 + 2 / [4(2n+m)−1]. Then χn,m(G) = 2(2n+m)+1.
Let Pg denote the family of planar graphs having girth at least g. Then for all g ≥ 8(2n + m), χn,m(Pg) = 2(2n + m) + 1.
For the family of T2 of partial 2-trees we have: (i) 14 ≤ χ0,3(T2) ≤ 15; (ii) 14 ≤ χ1,1(T2) ≤ 21.

Citat

Viktiga insikter från

On $(n,m)$-chromatic numbers of graphs having bounded sparsity parameters

by Sandip Das,A... på arxiv.org 03-05-2024

https://arxiv.org/pdf/2306.08069.pdf

Djupare frågor

What implications do the findings on arboricity have for practical applications

The findings on arboricity have significant implications for practical applications, especially in the field of network design and optimization. Arboricity is a measure of how well a graph can be decomposed into forests, which directly relates to the efficiency of data transmission in networks. By understanding the relationship between arboricity and chromatic numbers, we can optimize network structures to minimize interference and congestion. This knowledge can be applied in telecommunications, routing algorithms, wireless sensor networks, and other areas where efficient data flow is crucial.

How might the results on acyclic chromatic numbers impact current graph database technologies

The results on acyclic chromatic numbers can have a profound impact on current graph database technologies, particularly in query optimization and performance enhancement. Acyclic coloring plays a vital role in identifying independent sets of vertices that do not form cycles within graphs. By bounding the acyclic chromatic number by the (n,m)-chromatic number, we provide insights into structuring databases for faster query evaluation. This information can lead to improved indexing strategies, reduced computational complexity, and enhanced overall database efficiency.

How could the study on partial 2-trees influence advancements in computational algorithms

The study on partial 2-trees has the potential to influence advancements in computational algorithms by providing new insights into graph theory properties and their applications. Partial 2-trees are a specific class of graphs with unique structural characteristics that make them suitable for modeling various real-world problems efficiently. Understanding their (n,m)-chromatic numbers helps in developing more optimized algorithms for tasks such as network analysis, pattern recognition, image processing, and machine learning models based on graph representations. The results obtained from studying partial 2-trees could lead to algorithmic improvements that enhance performance across diverse computational domains.