Regular closed sets of permutations
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M.H. Albert; M.D. Atkinson; N. Ruškuc
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Article
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2003
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Elsevier Science
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English
⚖ 301 KB
Machines whose main purpose is to permute and sort data are studied. The sets of permutations that can arise are analysed by means of ÿnite automata and avoided pattern techniques. Conditions are given for these sets to be enumerated by rational generating functions. As a consequence we give the ÿrs