Authors: Tatiana GatevaIvanova Peter Cameron
Publish Date: 2011/12/13
Volume: 309, Issue: 3, Pages: 583-621
Abstract
We examine solutions here mainly from the point of view of permutation groups a solution gives rise to a map from X to the symmetric group SymX on X satisfying certain conditions whose image we call a Yang–Baxter permutation group Our results include new constructions based on strong twisted unions with an investigation of retracts and the multipermutation level and the solvable length of the groups defined by the solutions new results about decompositions of solutions of arbitrary cardinality into invariant subsets and decompositions and factorisations of the associated Yang–Baxter group as a product of groups of the solutions defined by these invariant subsets In particular we obtain strong decomposition results if the Yang–Baxter permutation group is abelian or the solution is of finite multipermutation level
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