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.
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arxiv.org
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by Daniel Neuen ที่ arxiv.org 03-08-2024
https://arxiv.org/pdf/2011.14730.pdfสอบถามเพิ่มเติม