Wilf classification of three and four letter signed patterns

Details Wilf classification of three and four letter signed patterns Wilf classification of three and four letter signed patterns

2006-04-03

arxiv.org/abs/math/0604025v1

Mathematics

Combinatorics

10 page; 2 figures

Scientific paper

We give some new Wilf equivalences for signed patterns which allow the
complete classification of signed patterns of lengths three and four. The
problem is considered for pattern avoidance by general as well as involutive
signed permutations.

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