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In this paper, we study $(s,s+1)$-core partitions with $d$-distinct parts. We obtain results on the number and the largest size of such partitions, so we extend Xiong's paper in which the results are obtained about $(s,s+1)$-core partitions…

Combinatorics · Mathematics 2019-11-26 Murat Sahin

We give a possible explanation for the mystery of a missing number in the statement of a problem that asks for the non-negative integers to be partitioned into three subsets. We interpret the missing number as one of the clues that can lead…

History and Overview · Mathematics 2017-08-04 Eunice Krinsky , Serban Raianu , Alexander Wittmond

The study of flattened partitions is an active area of current research. In this paper, our study unexpectedly leads us to the OEIS numbers A124324. We provide a new combinatorial interpretation of these numbers. A combinatorial bijection…

Combinatorics · Mathematics 2020-07-09 O. Nabawanda , F. Rakotondrajao , A. S. Bamunoba

George Andrews recently proved a new identity between the cardinalities of the set of Semi-Fibonacci partitions and the set of partitions into powers of two with all parts appearing an odd number of times. This paper extends the identity to…

Combinatorics · Mathematics 2019-11-20 Abdulaziz M. Alanazi , Augustine O. Munagi , Darlison Nyirenda

Recently, Hirschhorn and the first author considered the parity of the function $a(n)$ which counts the number of integer partitions of $n$ wherein each part appears with odd multiplicity. They derived an effective characterization of the…

Combinatorics · Mathematics 2022-04-05 James A. Sellers , Fabrizio Zanello

In this paper, we show that the difference between the number of parts in the odd partitions of $n$ and the number of parts in the distinct partitions of $n$ satisfies Euler's recurrence relation for the partition function $p(n)$ when $n$…

Combinatorics · Mathematics 2020-05-08 Mircea Merca

We consider some $q$-series which depend on a pair of positive integers $(k,m)$. While positivity of these series holds for the first few values of $(k,m)$, the situation is quite unclear for other values of $(k,m)$. In addition, our series…

Number Theory · Mathematics 2025-07-15 George E. Andrews , Mohamed El Bachraoui

In this article we study the "norm" of an integer partition, which we define to be the product of the parts. This partition-theoretic statistic has appeared here and there in the literature of the last century or so, and is at the heart of…

Number Theory · Mathematics 2021-02-16 Andrew V. Sills , Robert Schneider

We obtain the generating functions for partial matchings avoiding neighbor alignments and for partial matchings avoiding neighbor alignments and left nestings. We show that there is a bijection between partial matchings avoiding three…

Combinatorics · Mathematics 2010-09-24 William Y. C. Chen , Neil J. Y. Fan , Alina F. Y. Zhao

This paper critically examines arguments against independence, a measure of group fairness also known as statistical parity and as demographic parity. In recent discussions of fairness in computer science, some have maintained that…

Computers and Society · Computer Science 2021-01-11 Tim Räz

In 2010, Andrews considers a variety of parity questions connected to classical partition identities of Euler, Rogers, Ramanujan and Gordon. As a large part in his paper, Andrews considered the partitions by restricting the parity of…

Combinatorics · Mathematics 2018-01-08 Doris D. M. Sang , Diane Y. H. Shi

We investigate the parity of the coefficients of certain eta-quotients, extensively examining the case of $m$-regular partitions. Our theorems concern the density of their odd values, in particular establishing lacunarity modulo 2 for…

Combinatorics · Mathematics 2022-03-07 William J. Keith , Fabrizio Zanello

Unrefinable partitions are a subset of partitions into distinct parts which satisfy an additional unrefinability property. More precisely, being an unrefinable partition means that none of the parts can be written as the sum of smaller…

Combinatorics · Mathematics 2023-01-11 Riccardo Aragona , Lorenzo Campioni , Roberto Civino , Massimo Lauria

We prove a lemma that is useful to get upper bounds for the number of partitions without a given subsum. From this we can deduce an improved upper bound for the number of sets represented by the (unrestricted or into unequal parts)…

Combinatorics · Mathematics 2007-11-07 Jean-Christophe Aval

This paper considers three different partition relations from partition calculus, two of which are pair relations and one of which is a triple relation. An examination of the first partition relation and the ramification argument used to…

Logic · Mathematics 2019-04-17 Jonathon Eric Beers

In this paper, we consider the set of partitions $pend(n)$ which enumerates the number of partitions of $n$ wherein the even parts are not allowed to be distinct. Using a result of Newman, we prove a few infinite families of congruences…

Number Theory · Mathematics 2024-07-16 Hemjyoti Nath

Let $a_{r,s}(n)$ denote the number of mutlicolored partitions of $n$, wherein both even parts and odd parts may appear in one of $r$-colors and $s$-colors, respectively, for fixed $r,s\ge 1$. The paper aims to study arithmetic properties…

Combinatorics · Mathematics 2026-01-23 M. P. Thejitha , James A. Sellers , S. N. Fathima

For each positive integer $n$, we construct a bijection between the odd partitions and the distinct partitions of $n$ which extends Bressoud's bijection between the odd-and-distinct partitions of $n$ and the splitting partitions of $n$. We…

Combinatorics · Mathematics 2018-03-30 John Murray

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

We discuss a new companion to Capparelli's identities. Capparelli's identities for m=1,2 state that the number of partitions of $n$ into distinct parts not congruent to m, -m modulo $6$ is equal to the number of partitions of n into…

Combinatorics · Mathematics 2015-06-15 Alexander Berkovich , Ali Kemal Uncu