Moritz Lichter, Ilia Ponomarenko, Pascal Schweitzer. Walk refinement, walk logic, and the iteration number of the Weisfeiler-Leman algorithm. In 34th Annual ACM/IEEE Symposium on Logic in Computer Science, LICS 2019, Vancouver, BC, Canada, June 24-27, 2019. pages 1-13, IEEE, 2019. [doi]
Abstract is missing.