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It is well known that the number of partitions into distinct even parts equals the number of $4$-regular partitions. In this paper we prove identities relating certain restricted partitions into distinct even parts with restricted…

Combinatorics · Mathematics 2024-10-04 George E. Andrews , Mohamed El Bachraoui

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

Recently, Pankaj Jyoti Mahanta and Manjil P. Saikika proved some identities relating certain restricted partitions into distinct odd parts with the partition whose odd parts are distinct combinatorially. They asked for the q-series proofs.…

Combinatorics · Mathematics 2025-04-29 Yong-Chao Shen

Noting a curious link between Andrews' even-odd crank and the Stanley rank, we adopt a combinatorial approach building on the map of conjugation and continue the study of integer partitions with parts separated by parity. Our motivation is…

Number Theory · Mathematics 2025-06-11 Shishuo Fu , Dazhao Tang

We denote the number of partitions of $n$ wherein the even parts are distinct (and the odd parts are unrestricted) by $ped(n)$. In this paper, we will use generating function manipulations to obtain new congruences for $ped(n)$ modulo $24$.

Number Theory · Mathematics 2024-10-08 Hemjyoti Nath

Recently Andrews and Bachraoui proved identities relating certain restricted partitions into distinct even parts with restricted 4-regular partitions by the theory of basic hypergeometric series. They also posed a question regarding…

Combinatorics · Mathematics 2025-09-01 Dandan Chen , Ziyin Zou

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

Recently, Andrews and El Bachraoui (2024) proved three very interesting $q$-series identities, from which three simple looking identities involving certain restricted partitions into distinct even parts and $4$-regular partitions follow. In…

Combinatorics · Mathematics 2024-10-22 Pankaj Jyoti Mahanta , Manjil P. Saikia

In this note, we present a curious $q$-series identity with applications to certain partitions with bounded part differences.

Combinatorics · Mathematics 2018-05-23 Shane Chern

Partitions with distinct even parts have long been the subject of extensive research. In this paper, We present some new perspectives on such partitions from a combinatorial viewpoint, and connect them with signed partitions and bicolored…

Combinatorics · Mathematics 2026-03-12 Haijun Li

We prove a theorem which add a new member to Rogers-Ramanujan identities. This new member counts partitions with different type of constraints on even and odd parts. Generalizing this theorem, we obtain two family of partition identities of…

Algebraic Geometry · Mathematics 2021-11-11 Pooneh Afsharijoo

We present a new partition identity and give a combinatorial proof of our result. This generalizes a result of Andrew's in which he considers the generation function for partitions with respect to size, number of odd parts, and number of…

Combinatorics · Mathematics 2007-05-23 Cilanne E. Boulet

Recently, Hirschhorn and Sellers defined the partition function $a_r(n)$, which counts the number of partitions of $n$ wherein even parts come in only one color, while the odd parts may appear in one of $r$-colors for fixed $r\ge1$. The aim…

Number Theory · Mathematics 2025-11-19 M. P. Thejitha , S. N. Fathima

Recently, Andrews defined a partition function $\mathcal{EO}(n)$ which counts the number of partitions of $n$ in which every even part is less than each odd part. He also defined a partition function $\overline{\mathcal{EO}}(n)$ which…

Number Theory · Mathematics 2020-02-19 Chiranjit Ray , Rupam Barman

The partition function $pod(n)$ enumerates the partitions of $n$ wherein odd parts are distinct and even parts are unrestricted. Recently, a number of properties for $pod(n)$ have been established. In this paper, for $k\in\{0,2\}$ we…

Combinatorics · Mathematics 2022-10-26 Cristina Ballantine , Mircea Merca

In this paper we present a new class of integer partition identities. The number of partitions with d-distant parts can be represented as a sum of the number of partitions with 1-distant parts whose even parts are greater than twice the…

Combinatorics · Mathematics 2013-10-29 Ivica Martinjak , Dragutin Svrtan

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

We give a complete characterization of the parity of $b_8(n)$, the number of $8$-regular partitions of $n$. Namely, we prove that $b_8(n)$ is odd or even depending on whether or not we have the factorisation $24n+7=p^{4a+1}m^2$, for some…

Number Theory · Mathematics 2022-12-23 Giacomo Cherubini , Pietro Mercuri

In this paper, we generalize Andrews' partitions separated by parity to overpartitions in two ways. We investigate the generating functions for 16 overpartition families whose parts are separated by parity, and we prove various $q$-series…

Number Theory · Mathematics 2026-01-14 Kathrin Bringmann , Catherine Cossaboom , William Craig

The generating function of partitions with repeated (resp. distinct) parts such that each odd part is less than twice the smallest part is shown to be the third order mock theta function $\omega(q)$ (resp. $\nu(-q)$). Similar results for…

Number Theory · Mathematics 2015-03-16 George E. Andrews , Atul Dixit , Ae Ja Yee
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