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Euler's partition identity states that the number of partitions of $n$ into odd parts is equal to the number of partitions of $n$ into distinct parts. Strikingly, Straub proved in 2016 that this identity also holds when counting partitions…

Combinatorics · Mathematics 2025-02-19 Gabriel Gray , Emily Payne , Holly Swisher , Ren Watson

We show that the number of partitions of n with alternating sum k such that the multiplicity of each part is bounded by 2m+1 equals the number of partitions of n with k odd parts such that the multiplicity of each even part is bounded by m.…

Combinatorics · Mathematics 2012-08-23 William Y. C. Chen , Ae Ja Yee , Albert J. W. Zhu

PED partitions are partitions with even parts distinct while odd parts are unrestricted. Similarly, POD partitions have distinct odd parts while even parts are unrestricted. Merca proved several recurrence relations analytically for the…

Combinatorics · Mathematics 2023-08-14 Cristina Ballantine , Amanda Welch

In a 2016 paper, Straub proved an analogue to Euler's partition identity for partitions with fixed perimeter. Later, Fu and Tang provided a refinement and generalization of Straub's analogue to $d$-distinct partitions as well as a result…

Number Theory · Mathematics 2024-06-13 Ling Chen , Isabelle Hernandez , Zain Shields , Holly Swisher

Motivated by Andrews' recent work related to Euler's partition theorem, we consider the set of partitions of an integer $n$ where the set of even parts has exactly $j$ elements, versus the set of partitions of $n$ where the set of repeated…

Combinatorics · Mathematics 2017-05-16 Shishuo Fu , Dazhao Tang

Motivated by a recent paper of Straub, we study the distribution of integer partitions according to the length of their largest hook, instead of the usual statistic, namely the size of the partitions. We refine Straub's analogue of Euler's…

Combinatorics · Mathematics 2016-04-15 Shishuo Fu , Dazhao Tang

We consider the number of various partitions of $n$ with parts separated by parity and prove combinatorially several inequalities between these numbers. For example, we show that for $n\geq 5$ we have $p_{od}^{eu}(n)<p_{ed}^{ou}(n)$, where…

Combinatorics · Mathematics 2024-06-04 Cristina Ballantine , Amanda Welch

The partition perimeter is a statistic defined to be one less than the sum of the number of parts and the largest part. Recently, Amdeberhan, Andrews, and Ballantine proved the following analog of Glaisher's theorem: for all $m \geq 2$ and…

Combinatorics · Mathematics 2023-09-06 Hunter Waldron

We prove combinatorially some identities related to Euler's partition identity (the number of partitions of $n$ into distinct parts equals the number of partitions of $n$ into odd parts). They were conjectured by Beck and proved by Andrews…

Combinatorics · Mathematics 2018-07-02 Cristina Ballantine , Richard Bielak

In a recent paper, Andrews and Merca investigated the number of even parts in all partitions of $n$ into distinct parts, which arise naturally from the Euler-Glaisher bijective proof. They obtained new combinatorial interpretations for this…

Combinatorics · Mathematics 2022-07-11 Jiyou Li , Sicheng Zhao

In a recent work, Andrews gave analytic proofs of two conjectures concerning some variations of two combinatorial identities between partitions of a positive integer into odd parts and partitions into distinct parts discovered by Beck.…

Combinatorics · Mathematics 2018-10-09 Jane Y. X. Yang

Recently, Andrews and El Bachraoui considered the number of integer partitions whose smallest part is repeated exactly $k$ times and the remaining parts are not repeated. They presented several interesting results and posed questions…

Combinatorics · Mathematics 2025-05-15 Dandan Chen , Rong Chen , Mengjie Zhao

Integer partitions have long been of interest to number theorists, perhaps most notably Ramanujan, and are related to many areas of mathematics including combinatorics, modular forms, representation theory, analysis, and mathematical…

Number Theory · Mathematics 2020-10-20 Adriana L. Duncan , Simran Khunger , Holly Swisher , Ryan Tamura

Recently, Andrews gave a detailed study of partitions with even parts below odd parts in which only the largest even part appears an odd number of times. In this paper, we provide a combinatorial proof of the generating function identity of…

Combinatorics · Mathematics 2017-10-25 Shane Chern

Euler showed that the number of partitions of $n$ into distinct parts equals the number of partitions of $n$ into odd parts. This theorem was generalized by Glaisher and further by Franklin. Recently, Beck made three conjectures on…

Combinatorics · Mathematics 2020-02-20 Jia Huang

Andrews and El Bachraoui recently studied integer partitions where the smallest part is repeated a specified number of times and any other parts are distinct. Their results included two ``surprising identities'' for which they requested…

Combinatorics · Mathematics 2025-08-26 Brian Hopkins

A result of Legendre asserts that the difference between the numbers of (length) even and odd partitions of $n$ into distinct parts is $0$, $1$, or $-1$; this also follows from Euler's pentagonal number theorem. We establish an analogous…

Combinatorics · Mathematics 2024-05-07 Jia Huang

The famous partition theorem of Euler states that partitions of $n$ into distinct parts are equinumerous with partitions of $n$ into odd parts. Another famous partition theorem due to MacMahon states that the number of partitions of $n$…

Combinatorics · Mathematics 2023-10-16 Shi-Chao Chen

In this paper we consider permutations of sequences of partitions, obtaining a result which parallels von Neumann's theorem on permutations of dense sequences and uniformly distributed sequences of points.

Functional Analysis · Mathematics 2009-02-12 Ingrid Carbone , Aljosa Volcic

This article is an extensive study of partitions with fixed number of odd and even-indexed odd parts. We use these partitions to generalize recent results of C. Savage and A. Sills. Moreover, we derive explicit formulas for generating…

Number Theory · Mathematics 2016-04-12 Alexander Berkovich , Ali Kemal Uncu
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