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In this article, we first investigate the partitions whose parts are congruent to $a$ or $b$ modulo $k$ with the aid of separable integer partition classes with modulus $k$ introduced by Andrews. Then, we introduce the…

Combinatorics · Mathematics 2024-07-01 Thomas Y. He , C. S. Huang , H. X. Li , X. Zhang

In crystalline systems, higher-order topology, characterized by topological states of codimension greater than one, typically arises from the mismatch between Wannier centers and atomic sites, leading to filling anomalies. However, this…

Superconductivity · Physics 2024-01-29 Chaozhi Ouyang , Qinghua He , Dong-Hui Xu , Feng Liu

In the quantum theory, using the notion of partial supersymmetry, in which some, but not all, operators have superpartners we derive the Euler theorem in partition theory. The paraferminic partition function gives another identity in…

High Energy Physics - Theory · Physics 2007-05-23 Noureddine Chair

Two of the pillars of combinatorics are the notion of choosing an arbitrary subset of a set with $n$ elements (which can be done in $2^n$ ways), and the notion of choosing a $k$-element subset of a set with $n$ elements (which can be done…

Combinatorics · Mathematics 2007-05-23 James Propp

In this article we study the local structure of the Fibonacci Partition Function by relating it to a cocycle over an irrational rotation.

Number Theory · Mathematics 2023-11-13 Tom Kempton

In this paper, we introduce a natural geometric extension of the partition function. More precisely, we investigate the problem of counting partitions of a rectangle into rectangular blocks with integer sides. Here, two partitions of a…

Combinatorics · Mathematics 2025-10-02 Krystian Gajdzica , Robin Visser , Maciej Zakarczemny

In recent work, M. Just and the second author defined a class of "semi-modular forms" on $\mathbb C$, in analogy with classical modular forms, that are "half modular" in a particular sense; and constructed families of such functions as…

Number Theory · Mathematics 2021-08-03 A. P. Akande , Robert Schneider

We study the concatenated Fibonacci constant $\mathcal{F} := 0.F_{1}F_{2}F_{3}\cdots = 0.11235813\cdots$, obtained by concatenating the Fibonacci numbers in the fractional part, and ask whether it is normal. We show that several classical…

Number Theory · Mathematics 2026-04-21 José Ricardo G. Mendonça

The study of pattern avoidance in permutations, and specifically in flattened partitions is an active area of current research. In this paper, we count the number of distinct flattened partitions over [n] avoiding a single pattern, as well…

Combinatorics · Mathematics 2020-11-17 Olivia Nabawanda , Fanja Rakotondrajao

We study a recursively defined two-parameter family of graphs which generalize Fibonacci cubes and Pell graphs and determine their basic structural and enumerative properties. In particular, we show that all of them are induced subgraphs of…

Combinatorics · Mathematics 2023-07-27 Tomislav Došlić , Luka Podrug

We dedicate this paper to investigate the most generalized form of Fibonacci Sequence, one of the most studied sections of the mathematical literature. One can notice that, we have discussed even a more general form of the conventional one.…

General Mathematics · Mathematics 2015-02-25 Masum Billal

We introduce a new combinatorial structure: the superselector. We show that superselectors subsume several important combinatorial structures used in the past few years to solve problems in group testing, compressed sensing, multi-channel…

Data Structures and Algorithms · Computer Science 2010-10-07 Ferdinando Cicalese , Ugo Vaccaro

A boolean matrix is blocky if its $1$-entries form a collection of 1-monochromatic submatrices that are disjoint in both rows and columns. Blocky matrices are precisely the set of boolean matrices with $\gamma_2$ factorization norm at most…

Classical Analysis and ODEs · Mathematics 2025-07-16 Marcel K. Goh , Hamed Hatami

We present an involution on set partitions that interchanges two statistics related to relative size of block entries and use it to establish an equidistribution on objects counted by the Bessel numbers.

Combinatorics · Mathematics 2022-04-07 David Callan

In 2015, Bringmann, Lovejoy and Mahlburg considered certain kinds overpartitions, which can been seen as the overpartition analogue of Schur's partition. The motivation of their work is that the difference between the generating function of…

Combinatorics · Mathematics 2018-01-09 Doris D. M. Sang , Diane Y. H. Shi

For many meta-Fibonacci sequences it is possible to identify a partition of the sequence into successive intervals (sometimes called blocks) with the property that the sequence behaves "similarly" in each block. This partition provides…

Combinatorics · Mathematics 2011-05-26 Barnaby Dalton , Mustazee Rahman , Stephen Tanny

We consider the number of the $6$-regular partitions of $n$, $b_6(n)$, and give infinite families of congruences modulo $3$ (in arithmetic progression) for $b_6(n)$. We also consider the number of the partitions of $n$ into distinct parts…

Number Theory · Mathematics 2023-02-03 Cristina Ballantine , Mircea Merca

In this work we discuss Dirichlet products evaluated at Fibonacci numbers. As first applications of the results we get a representation of Fibonacci numbers in terms of Euler's totient function, an upper bound on the number of primitive…

Number Theory · Mathematics 2016-06-07 Uwe Stroinski

The notion of exponential Dowling structures is introduced, generalizing Stanley's original theory of exponential structures. Enumerative theory is developed to determine the M\"obius function of exponential Dowling structures, including a…

Combinatorics · Mathematics 2010-09-23 Richard Ehrenborg , Margaret Readdy

We present a detailed study of the dynamics of electronic wavepackets in Fibonacci semiconductor superlattices, both in flat band conditions and subject to homogeneous electric fields perpendicular to the layers. Coherent propagation of…

Mesoscale and Nanoscale Physics · Physics 2009-10-28 Enrique Diez , Francisco Dominguez-Adame , Enrique Macia , Angel Sanchez