Random Graph Matching with Improved Noise Robustness
Abstract
Graph matching, also known as network alignment, refers to finding a bijection between the vertex sets of two given graphs so as to maximally align their edges. This fundamental computational problem arises frequently in multiple fields such as computer vision and biology. Recently, there has been a plethora of work studying efficient algorithms for graph matching under probabilistic models. In this work, we propose a new algorithm for graph matching: Our algorithm associates each vertex with a signature vector using a multistage procedure and then matches a pair of vertices from the two graphs if their signature vectors are close to each other. We show that, for two ErdősRényi graphs with edge correlation $1\alpha$, our algorithm recovers the underlying matching exactly with high probability when $\alpha \le 1 / (\log \log n)^C$, where $n$ is the number of vertices in each graph and $C$ denotes a positive universal constant. This improves the condition $\alpha \le 1 / (\log n)^C$ achieved in previous work.
 Publication:

arXiv eprints
 Pub Date:
 January 2021
 arXiv:
 arXiv:2101.11783
 Bibcode:
 2021arXiv210111783M
 Keywords:

 Computer Science  Data Structures and Algorithms;
 Mathematics  Probability;
 Mathematics  Statistics Theory;
 Statistics  Machine Learning
 EPrint:
 34 pages. Accepted for presentation at Conference on Learning Theory (COLT) 2021