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28 March 2024
 
  » arxiv » 1305.3177

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Total occurrence statistics on restricted permutations
Alexander Burstein ; Sergi Elizalde ;
Date 14 May 2013
AbstractWe study the total number of occurrences of several vincular (also called generalized) patterns and other statistics, such as the major index and the Denert statistic, on permutations avoiding a pattern of length 3, extending results of Bona (2010, 2012) and Homberger (2012). In particular, for 2-3-1-avoiding permutations, we find the total number of occurrences of any vincular pattern of length 3. In some cases the answer is given by simple expressions involving binomial coefficients. The tools we use are bijections with Dyck paths, generating functions, and block decompositions of permutations.
Source arXiv, 1305.3177
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