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CayleyR: Solving the TopSpin puzzle via cycle intersection

cayleyR is an R package for solving permutation puzzles by detecting cycle intersections in Cayley graphs. It uses an iterative bidirectional search and distance-guided bridge selection. The package targets the TopSpin(n,k) puzzle and leverages C++ indexing with optional Vulkan GPU acceleration. It is available on CRAN.

SourcearXiv AIAuthor: Yuri Baramykov

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[Submitted on 14 Jul 2026]

Title:CayleyR: Solving the TopSpin puzzle via cycle intersection

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Abstract:We present cayleyR, an R package for solving permutation puzzles by detecting cycle intersections in Cayley graphs. The core algorithm performs an iterative bidirectional search: from both the initial and target permutation states, random operation sequences generate cycles in the Cayley graph of the symmetric group Sn; their intersection yields a connecting path. When no direct intersection is found, a distance-guided bridge selection narrows the gap, and the process repeats. The package targets the TopSpin(n,k) puzzle, whose state space is a Cayley graph of Sn generated by a cyclic shift and a prefix reversal. We describe the mathematical framework, the algorithm, and its implementation, which combines a C++ hash-indexed state store with optional Vulkan GPU acceleration. The software is publicly available on CRAN.

Comments: 17 pages, 2 figures

Subjects:

Artificial Intelligence (cs.AI)

MSC classes: 20B40, 05C25, 68W05

ACM classes: F.2.2; I.2.8; G.2.1

Cite as: arXiv:2607.13219 [cs.AI]

(or arXiv:2607.13219v1 [cs.AI] for this version)

https://doi.org/10.48550/arXiv.2607.13219

arXiv-issued DOI via DataCite (pending registration)

Submission history

From: Yuri Baramykov [view email] [v1] Tue, 14 Jul 2026 19:28:41 UTC (312 KB)

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