Classification of Finite Alexander Quandles

Sam Nelson

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Classification of Finite Alexander Quandles

Sam Nelson

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Abstract

Two finite Alexander quandles with the same number of elements are isomorphic iff their Z[t,t^-1]-submodules Im(1-t) are isomorphic as modules. This yields specific conditions on when Alexander quandles of the form Z_n[t,t^-1]/(t-a) where gcd(n,a)=1 (called linear quandles) are isomorphic, as well as specific conditions on when two linear quandles are dual and which linear quandles are connected. We apply this result to obtain a procedure for classifying Alexander quandles of any finite order and as an application we list the numbers of distinct and connected Alexander quandles with up to fifteen elements.

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Sam Nelson. 2003-03-08. Classification of Finite Alexander Quandles. https://arxiv.org/abs/math/0202281

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