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COMBINATORICS
2004
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13 years 11 months ago
Multiple Pattern Avoidance with respect to Fixed Points and Excedances
We study the distribution of the statistics `number of fixed points' and `number of excedances' in permutations avoiding subsets of patterns of length 3. We solve all th...
Sergi Elizalde
ARSCOM
2005
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13 years 11 months ago
On multi-avoidance of generalized patterns
In [Kit1] Kitaev discussed simultaneous avoidance of two 3-patterns with no internal dashes, that is, where the patterns correspond to contiguous subwords in a permutation. In thre...
Sergey Kitaev, Toufik Mansour
ARSCOM
2005
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13 years 11 months ago
Simultaneous Avoidance Of Generalized Patterns
In [BabStein] Babson and Steingr
Sergey Kitaev, Toufik Mansour