核心概念
Graph Isomorphism for graphs excluding small topological subgraphs can be efficiently tested in time npolylog(h).
要約
The article discusses an isomorphism test for graphs excluding small topological subgraphs, focusing on time complexity and algorithmic strategies. It presents a new isomorphism algorithm that significantly improves previous tests for graphs of maximum degree and Hadwiger number. The algorithm follows a decomposition strategy and relies on the Color Refinement algorithm. Key insights include the t-CR-bounded property and closure operators for sets. The main technical contribution is an alternative algorithm for finding suitable initial sets. The proof involves a detailed analysis of the 3-dimensional Weisfeiler-Leman algorithm and closure graphs. The article concludes with structural insights into automorphism groups and a detailed overview of the algorithm.
Structure:
- Abstract
- Introduction
- Background on Graph Isomorphism
- Isomorphism Tests for Restricted Graph Classes
- Decomposition Strategy and Closure Operators
- Finding Initial Sets Algorithm
- Technical Proof and Analysis
- Structural Insights on Automorphism Groups
- Conclusion and Algorithm Overview
統計
Unser Ergebnis vereint und erweitert frühere Isomorphismustests für Graphen mit maximalem Grad d und Hadwiger-Nummer h.
Die Zeitkomplexität für den Isomorphismustest beträgt npolylog(h).
引用
"The main result of this work is a new isomorphism algorithm for graphs that exclude some h-vertex graph as a topological subgraph."
"The algorithm follows the same decomposition strategy that is already used by Grohe et al. in [15] for testing isomorphism of graphs excluding Kh as a minor."