Abstract
In this paper, we explore the algebraic interpretation of the partitioning obtained by the 𝑚-dimensional Weisfeiler–Leman algorithm on the direct power Gm of a finite group G. We define and study a Schur ring over Gm, which provides insights into the structure of the group G. Our analysis reveals that this ring determines the group G up to isomorphism when m≥3. Furthermore, we demonstrate that as m increases, the Schur ring associated with the group of automorphisms of G acting on Gm emerges naturally. Surprisingly, we establish that finding the limit ring is polynomial-time equivalent to solving the group isomorphism problem. This paper presents a novel algebraic framework for understanding the behavior of the Weisfeiler–Leman algorithm and its implications for group theory and computational complexity.
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More From: International Journal of Mathematics and Statistics Studies
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