Enumeration of small Wilf classes avoiding 1324 and two other 4-letter patterns
نویسندگان
چکیده
منابع مشابه
Wilf classification of triples of 4-letter patterns II
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متن کاملWilf classification of triples of 4-letter patterns I
HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau...
متن کاملoutputs Permutations avoiding 1324 and patterns in
The class Av(1324), of permutations avoiding the pattern 1324, is one of the simplest sets of combinatorial objects to define that has, thus far, failed to reveal its enumerative secrets. By considering certain large subsets of the class, which consist of permutations with a particularly regular structure, we prove that the growth rate of the class exceeds 9.81. This improves on a previous lowe...
متن کاملEnumeration of Some Classes of Words Avoiding Two Generalized Patterns of Length Three
The method we have applied in [BFP] to count pattern avoiding permutations is adapted to words. As an application, we enumerate several classes of words simultaneously avoiding two generalized patterns of length 3.
متن کاملresearch publications and other research outputs Permutations avoiding 1324 and patterns in
The class Av(1324), of permutations avoiding the pattern 1324, is one of the simplest sets of combinatorial objects to define that has, thus far, failed to reveal its enumerative secrets. By considering certain large subsets of the class, which consist of permutations with a particularly regular structure, we prove that the growth rate of the class exceeds 9.81. This improves on a previous lowe...
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ژورنال
عنوان ژورنال: Pure Mathematics and Applications
سال: 2018
ISSN: 1788-800X
DOI: 10.1515/puma-2015-0026