Article
Mathematics
Dixy Msapato
Summary: This paper introduces the modular Fuss-Catalan numbers, providing an explicit formula for calculating equivalence classes of parenthesizations and a characterization of k-associativity.
DISCRETE MATHEMATICS
(2022)
Article
Mathematics
Priyavrat Deshpande, Krishna Menon, Writika Sarkar
Summary: This paper investigates the mathematical problem of hyperplane arrangement and its region counts, and determines that the region count of the A(n)((m)) arrangement is a type of two-parameter Fuss-Catalan numbers. It also establishes a bijection between these regions and certain decorated Dyck paths, and computes the characteristic polynomial and provides a combinatorial interpretation of its coefficients.
JOURNAL OF ALGEBRAIC COMBINATORICS
(2023)
Article
Mathematics
Suhyung An, Jiyoon Jung, Sangwook Kim
Summary: In this paper, the authors generalize the enumeration of Fuss-Catalan paths with a fixed type and fixed number of blocks. Two proofs are presented, one utilizing the Chung-Feller theorem and a certain polynomial, and the other being bijective. Additionally, a conjecture is proposed extending this result to the family of small Fuss-Schroder paths.
HONAM MATHEMATICAL JOURNAL
(2021)
Article
Mathematics
Ji-Cai Liu, Yan-Ni LI
Summary: This article discusses the integrality of the sequence A(n,m) observed by Catalan as early as 1874 and named the super Catalan numbers. By investigating the positivity of the q-super Catalan numbers, a q-analogue of Apagodu's congruence involving super Catalan numbers is established through proving the divisibility of sums of q-super Catalan numbers.
BULLETIN OF THE AUSTRALIAN MATHEMATICAL SOCIETY
(2023)
Article
Mathematics
Per Alexandersson, Frether Getachew Kebede, Samuel Asefa Fufa, Dun Qiu
Summary: We study permutations with entries restricted to the same remainder as the index modulo some integer k ≥ 2. By imposing the classical 132- or 213-avoidance restriction on the permutations, we recover special cases of the Fuss-Catalan and Raney numbers. Surprisingly, a similar statement holds for a Catalan family of subexcedant functions with the mod k restriction. Finally, we enumerate all combinations of mod-k-alternating permutations that avoid two patterns of length 3, analogous to Simion and Schmidt's systematic study of permutations avoiding two patterns of length 3.
JOURNAL OF INTEGER SEQUENCES
(2023)
Article
Mathematics
Norihiro Nakashima, Shuhei Tsujie
Summary: The paper studies the number of flats in a hyperplane arrangement, considering it as a generalization of the Bell number and the Stirling number of the second kind. Robert Gill provides an exponential generating function for the number of flats in the extended Catalan arrangements using species. The species of flats in the extended Catalan and Shi arrangements are introduced and obtained through iterated substitution of species of sets and lists, and the flats of these arrangements are enumerated in terms of infinite matrices.
JOURNAL OF INTEGER SEQUENCES
(2021)
Article
Mathematics
Xiaojing Chen, Wenchang Chu
Summary: This study establishes q-analogues for three summation formulae related to the lambda-extended Catalan numbers.
BULLETIN OF THE BRAZILIAN MATHEMATICAL SOCIETY
(2021)
Article
Computer Science, Interdisciplinary Applications
Rebecca E. Garcia, Pamela E. Harris, Marissa Loving, Lucy Martinez, David Melendez, Joseph Rennie, Gordon Rojas Kirby, Daniel Tinoco
Summary: This paper considers the closed formulas for the q-analog of Kostant's weight multiplicity in the Lie algebra sl(4)(C) and introduces the important elements of Weyl alternation sets and their associated Weyl alternation diagrams for calculating Kostant's weight multiplicity. This work answers a question posed in 2019.
APPLICABLE ALGEBRA IN ENGINEERING COMMUNICATION AND COMPUTING
(2022)
Article
Mathematics
Zurab Janelidze, Helmut Prodinger, Francois van Niekerk
Summary: In this paper, we investigate the maximal chains in lattices generated from powers of chains using iterated lax colimits in the 2-category of posets. This study is motivated by the fact that in lower dimensions, we obtain well-known combinatorial objects such as Dyck paths and Kreweras walks.
ORDER-A JOURNAL ON THE THEORY OF ORDERED SETS AND ITS APPLICATIONS
(2023)
Article
Mathematics, Applied
Can Kizilates, Selihan Kirlak
Summary: In this paper, a new generalization of Fibonacci and Lucas type sedenions called q-Fibonacci and q-Lucas sedenions are introduced using the q-integer. It is stated that the special cases of these types of sedenions give the various sedenions whose components are defined by second order integer sequences. Some fundamental properties of these types of sedenions are also presented.
JOURNAL OF DISCRETE MATHEMATICAL SCIENCES & CRYPTOGRAPHY
(2022)