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Multi-avoidance of generalised patterns
Authors:Sergey Kitaev  
Institution:

Matematiska Institutionen, Chalmers Tekniska Högskola and Göteborgs Universitet, Eklandgatan 86, S-412 96, Göteborg, Sweden

Abstract:Recently, Babson and Steingrímsson introduced generalised permutation patterns that allow the requirement that two adjacent letters in a pattern must be adjacent in the permutation. We investigate simultaneous avoidance of two or more 3-patterns without internal dashes, that is, where the pattern corresponds to a contiguous subword in a permutation.
Keywords:Permutations  Patterns  Pattern-avoidance  Generalised patterns
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