Combinatorial Gray codes for classes of pattern avoiding permutations
Combinatorics
2008-01-09 v2
Abstract
The past decade has seen a flurry of research into pattern avoiding permutations but little of it is concerned with their exhaustive generation. Many applications call for exhaustive generation of permutations subject to various constraints or imposing a particular generating order. In this paper we present generating algorithms and combinatorial Gray codes for several families of pattern avoiding permutations. Among the families under consideration are those counted by Catalan, Schr\"oder, Pell, even index Fibonacci numbers and the central binomial coefficients. Consequently, this provides Gray codes for for all and the obtained Gray codes have distances 4 and 5.
Cite
@article{arxiv.0704.2048,
title = {Combinatorial Gray codes for classes of pattern avoiding permutations},
author = {W. M. B. Dukes and Mark F. Flanagan and Toufik Mansour and V. Vajnovszki},
journal= {arXiv preprint arXiv:0704.2048},
year = {2008}
}