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Motivated in part by hook-content formulas for certain restricted partitions in representation theory, we consider the total number of hooks of fixed length in odd versus distinct partitions. We show that there are more hooks of length $2$,…

Combinatorics · Mathematics 2023-08-30 Cristina Ballantine , Hannah Burson , William Craig , Amanda Folsom , Boya Wen

Recently, the theory of hook length biases has emerged as a prominent research topic. Led by Ballantine, Burson, Craig, Folsom, and Wen [\textit{Res. Math. Sci.}, 2023], hook length biases are being explored for ordinary partitions, odd…

Combinatorics · Mathematics 2026-03-13 Nayandeep Deka Baruah , Hirakjyoti Das , Pankaj Jyoti Mahanta , Manjil P. Saikia

In this paper, we count the total number of hooks of length two in all odd partitions of $n$ and all distinct partitions of $n$ with a bound on the largest part of the partitions. We generalize inequalities of Ballantine, Burson, Craig,…

Combinatorics · Mathematics 2025-04-14 Alexander Berkovich , Aritram Dhar

In this article, we study hook lengths of ordinary partitions and $t$-regular partitions. We establish hook length biases for the ordinary partitions and motivated by them we find a few interesting hook length biases in $2$-regular…

Combinatorics · Mathematics 2024-05-30 Gurinder Singh , Rupam Barman

In 2010, G.-N. Han obtained the generating function for the number of size $t$ hooks among integer partitions. Here we obtain these generating functions for self-conjugate partitions, which are particularly elegant for even $t$. If…

Combinatorics · Mathematics 2024-02-09 Tewodros Amdeberhan , George E. Andrews , Ken Ono , Ajit Singh

Recently, Amdeberhan et al. proved congruences for the number of hooks of fixed even length among the set of self-conjugate partitions of an integer $n$, therefore answering positively a conjecture raised by Ballantine et al.. In this…

Combinatorics · Mathematics 2026-01-26 Frédéric Jouhet , David Wahiche

We confirm the speculation that the distribution of $t$-hooks among unrestricted integer partitions essentially descends to self-conjugate partitions. Namely, we prove that the number of hooks of length $t$ among the size $n$ self-conjugate…

Combinatorics · Mathematics 2025-04-11 William Craig , Ken Ono , Ajit Singh

Recently, there has been a lot of work on combinatorial inequalities related to hook-lengths in $t$-regular partitions. In this short note, we give a proof using generating functions for a result proved by Singh and Barman (2026) using…

Combinatorics · Mathematics 2026-01-12 Manjil P. Saikia , Prabal Talukdar

In this paper, we consider the asymptotic properties of hook numbers of partitions in restricted classes. More specifically, we compare the frequency with which partitions into odd parts and partitions into distinct parts have hook numbers…

Combinatorics · Mathematics 2026-02-13 William Craig , Madeline Locus Dawsey , Guo-Niu Han

Let $t\geq2$ and $k\geq1$ be integers. A $t$-regular partition of a positive integer $n$ is a partition of $n$ such that none of its parts is divisible by $t$. Let $b_{t,k}(n)$ denote the number of hooks of length $k$ in all the $t$-regular…

Combinatorics · Mathematics 2025-01-09 Rupam Barman , Pankaj Jyoti Mahanta , Gurinder Singh

In this article, we study hook lengths in $\ell$-regular partitions and $\ell$-distinct partitions. More precisely, we establish hook length inequalities between $\ell$-regular partitions and $\ell$-distinct partitions for hook lengths $2$…

Combinatorics · Mathematics 2025-04-15 Eunmi Kim

Let $b_{t,i}(n)$ denote the total number of the $i$ hooks in the $t$-regular partitions of $n$. Singh and Barman (J. Number Theory { 264} (2024), 41--58) raised two conjectures on $b_{t,i}(n)$. The first conjecture is on the positivity of…

Combinatorics · Mathematics 2025-01-24 Wenxia Qu , Wenston J. T. Zang

Let $b_{n,k}$ denote the number of hooks of length $k$ in all the $t$-regular partitions of $n$. Singh and Barman raised the question of finding the relation between $b_{t,2}(n)$ and $b_{t,1}(n)$. Kim showed that there exists $N$ such that…

Combinatorics · Mathematics 2025-05-01 Hongshu Lin , Wenston J. T. Zang

Some conjectures on partition hook lengths, recently stated by the author, have been proved and generalized by Stanley, who also needed a formula by Andrews, Goulden and Jackson on symmetric functions to complete his derivation. Another…

Combinatorics · Mathematics 2008-07-14 Guo-Niu Han

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

Recently, Griffin, Ono, and Tsai examined the distribution of the number of $t$-hooks in partitions of $n$, which was later followed by the work of Craig, Ono, and Singh on the distribution of the number of $t$-hooks in self-conjugate…

Combinatorics · Mathematics 2025-03-18 Hyunsoo Cho , Byungchan Kim , Eunmi Kim , Ae Ja Yee

Let $b_{t,i}(n)$ denote the total number of $i$-hooks in $t$-regular partitions of $n$. Singh and Barman conjectured that $b_{t+1,2}(n) \geq b_{t,2}(n)$ holds for all $t\ge 3$ and $n\ge 0$. This conjecture was known to hold for $t=3$ due to…

Combinatorics · Mathematics 2025-11-20 Hongshu Lin , Wenston J. T. Zang

In a recent paper, Bringmann, Craig, Ono, and the author showed that the number of $t$-hooks ($t\geq2$) among all partitions of $n$ is not always asymptotically equidistributed on congruence classes $a \pmod{b}$. In this short note, we…

Combinatorics · Mathematics 2023-12-15 Joshua Males

Let $t\geq2$ and $k\geq1$ be integers. A $t$-regular partition of a positive integer $n$ is a partition of $n$ such that none of its parts is divisible by $t$. Let $b_{t,k}(n)$ denote the number of hooks of length $k$ in all the $t$-regular…

Combinatorics · Mathematics 2025-06-18 Gurinder Singh , Rupam Barman

The dimension of an irreducible representation of $GL(n,\mathbb{C})$, $Sp(2n)$, or $SO(n)$ is given by the respective hook-length and content formulas for the corresponding partition. The first author, inspired by the Nekrasov-Okounkov…

Combinatorics · Mathematics 2022-05-17 Tewodros Amdeberhan , George E. Andrews , Cristina Ballantine
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