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The partition function, $p_A(n)$, is defined to be the number of partitions of $n$ with parts in the set A, where $n$ is a positive integer and $A$ is a set of positive integers. It is well documented that: if A is a finite set with…

Combinatorics · Mathematics 2025-09-23 David Christopher , Davamani Christober

Let $b(n)$ be the number of partition triples $\pi=(\pi_1,\pi_2,\pi_3)$ of $n$ such that $\pi_1$ consists of distinct odd parts, and $\pi_2$ and $\pi_3$ consist of parts divisible by $4$. Utilizing modular forms, Lin obtained the generating…

Number Theory · Mathematics 2026-01-09 Russelle Guadalupe

This paper addresses the problem of finding $Q_{m,t}\left(n\right)$, the number of possible ways to partition any member $n$ of the cyclic group $\mathbb{Z}/m\mathbb{Z}$ into $t$ distinct parts. When $m$ is odd, it was previously known that…

Combinatorics · Mathematics 2019-06-04 Steven S Poon

The partitions of the integers can be expressed exactly in an iterative and closed-form expression. This equation is derived from distributing the partitions of a number in a network that locates each partition in a unique and orderly…

Number Theory · Mathematics 2021-10-11 Romulo L. Cruz-Simbron

Andrews, Lewis and Lovejoy introduced the partition function $PD(n)$ as the number of partitions of $n$ with designated summands. A bipartition of $n$ is an ordered pair of partitions $(\pi_1, \pi_2)$ with the sum of all of the parts being…

Combinatorics · Mathematics 2021-02-26 R. X. J. Hao , E. Y. Y. Shen

The partition functions $P(n,m,p)$, the number of integer partitions of $n$ into exactly $m$ parts with each part at most $p$, and $Q(n,m,p)$, the number of integer partitons of $n$ into exactly $m$ distinct parts with each part at most…

General Mathematics · Mathematics 2022-12-20 M. J. Kronenburg

We introduce and study the recursive divisor function, a recursive analog of the usual divisor function: $\kappa_x(n) = n^x + \sum_{d\lfloor n} \kappa_x(d)$, where the sum is over the proper divisors of $n$. We give a geometrical…

Number Theory · Mathematics 2023-08-08 Thomas Fink

We prove that the partition function $p(n)$ is log-concave for all $n>25$. We then extend the results to resolve two related conjectures by Chen. The proofs are based on Lehmer's estimates on the remainders of the Hardy--Ramanujan and the…

Combinatorics · Mathematics 2014-07-07 Stephen DeSalvo , Igor Pak

The paper introduce a new type of partitions where the largest part appears exactly once, and the remaining parts constitute a partition of that largest part. We derive the generating function associated with these partitions and…

Combinatorics · Mathematics 2025-06-16 H Kaur , M Rana

The number of standard Young tableaux possible of shape corresponding to a partition $\lambda$ is called the dimension of the partition and is denoted by $f^{\lambda}$. Partitions with odd dimensions were enumerated by McKay and were…

Combinatorics · Mathematics 2025-11-18 Aditya Khanna

In this paper, we study the partition functions $\overline{R_\ell^\ast}(n)$, which count the number of overpartitions of $n$ where the non-overlined parts are $\ell$-regular for a given $\ell$. Using elementary techniques, as well as the…

Number Theory · Mathematics 2025-06-10 Hemjyoti Nath , Manjil P. Saikia , James A. Sellers

In this article, we introduce the notion of almost consecutive partitions. A partition is almost consecutive if every term is consecutive, with the possible exception of the smallest one. We find formulas relating to the smallest parts of…

Combinatorics · Mathematics 2024-03-26 Rajat Gupta , Noah Lebowitz-Lockard

Very recently, Thejitha, Sellers, and Fathima defined the function $a_{r,s}(n)$, which enumerates the number of multicolored partitions of $n$, wherein both even parts and odd parts may appear in one of $r$-colors and $s$-colors,…

Combinatorics · Mathematics 2026-03-11 M. P. Thejitha , S. N. Fathima

In this paper, we establish that the number of partitions of a natural number with positive odd rank is equal to the number of two-color partitions (red and blue), where the smallest part is even (say $2n$) and all red parts are even and…

Combinatorics · Mathematics 2025-01-14 George E. Andrews , Rahul Kumar

Linear inequalities involving Euler's partition function $p(n)$ have been the subject of recent studies. In this article, we consider the partition function $Q(n)$ counting the partitions of $n$ into distinct parts. Using truncated theta…

Combinatorics · Mathematics 2020-06-16 Mircea Merca

We prove specific biases in the number of occurrences of parts belonging to two different residue classes $a$ and $b$, modulo a fixed non-negative integer $m$, for the sets of unrestricted partitions, partitions into distinct parts, and…

Combinatorics · Mathematics 2025-02-03 Michael J. Schlosser , Nian Hong Zhou

Let $T(n,m)$ be the set of all plane labelled bipartite trees with $n$ white vertices and $m$ black. If the number $n+m$ of vertices is even, then the set $T(n,m)$ is a union of two disjoint subsets --- subset od "even" trees and subset of…

Combinatorics · Mathematics 2016-11-04 Yury Kochetkov

In the $1970$s, Nicolas proved that the partition function $p(n)$ is log-concave for $ n > 25$. In \cite{HNT21}, a precise conjecture on the log-concavity for the plane partition function $\func{pp}(n)$ for $n >11$ was stated. This was…

Combinatorics · Mathematics 2022-07-20 Bernhard Heim , Markus Neuhauser

We study the recurrence of the product of n functions, each of which satisfies the same recurrence relation.

Number Theory · Mathematics 2013-05-07 Cheng Lien Lang , Mong Lung Lang

The number of ordered factorizations and the number of recursive divisors are two related arithmetic functions that are recursively defined. But it is hard to construct explicit representations of these functions. Taking advantage of their…

Number Theory · Mathematics 2023-08-01 T. M. A. Fink
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