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(p,q,t)-Catalan continued fractions, gamma expansions and pattern avoidances
KTH, School of Engineering Sciences (SCI), Mathematics (Dept.).
College of mathematics and physics, Wenzhou University, Wenzhou 325035, PR China.ORCID iD: 0000-0001-9627-6906
2024 (English)In: Advances in Applied Mathematics, ISSN 0196-8858, E-ISSN 1090-2074, Vol. 159, article id 102735Article in journal (Refereed) Published
Abstract [en]

We introduce a kind of (p,q,t)-Catalan numbers of Type A by generalizing the J-type continued fraction formula, we prove that the corresponding expansions could be expressed by the polynomials counting permutations on Sn(321) by various descent statistics. Moreover, we introduce a kind of (p,q,t)-Catalan numbers of Type B by generalizing the J-type continued fraction formula, we prove that the Taylor coefficients and their γ-coefficients could be expressed by the polynomials counting permutations on Sn(3124,4123,3142,4132) by various descent statistics. Our methods include permutation enumeration techniques involving variations of bijections from permutation patterns to labeled Motzkin paths and modified Foata-Strehl action.

Place, publisher, year, edition, pages
Elsevier BV , 2024. Vol. 159, article id 102735
Keywords [en]
Catalan numbers, Continued fraction, Group action, Pattern avoidance, γ-positive
National Category
Discrete Mathematics
Identifiers
URN: urn:nbn:se:kth:diva-350698DOI: 10.1016/j.aam.2024.102735ISI: 001267738800001Scopus ID: 2-s2.0-85197511379OAI: oai:DiVA.org:kth-350698DiVA, id: diva2:1884664
Note

QC 20240719

Available from: 2024-07-17 Created: 2024-07-17 Last updated: 2024-08-19Bibliographically approved

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Han, Bin

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