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Uncommon suffix tries
Authors:Peggy Cénac  Brigitte Chauvin  Frédéric Paccaut  Nicolas Pouyanne
Affiliation:1. Université de Bourgogne, Institut de Mathématiques de Bourgogne, IMB UMR 5584 CNRS, France;2. Université de Versailles‐St‐Quentin, Laboratoire de Mathématiques de Versailles, CNRS, UMR 8100, France;3. LAMFA, CNRS, UMR 7352, Université de Picardie Jules Verne, France
Abstract:Common assumptions on the source producing the words inserted in a suffix trie with n leaves lead to a urn:x-wiley:10429832:media:rsa20500:rsa20500-math-0001 height and saturation level. We provide an example of a suffix trie whose height increases faster than a power of n and another one whose saturation level is negligible with respect to urn:x-wiley:10429832:media:rsa20500:rsa20500-math-0002. Both are built from VLMC (Variable Length Markov Chain) probabilistic sources and are easily extended to families of tries having the same properties. The first example corresponds to a “logarithmic infinite comb” and enjoys a non uniform polynomial mixing. The second one corresponds to a “factorial infinite comb” for which mixing is uniform and exponential. © 2013 Wiley Periodicals, Inc. Random Struct. Alg., 46, 117–141, 2015
Keywords:variable length Markov chain  probabilistic source  mixing properties  prefix tree  suffix tree  suffix trie
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