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Motivated by the many roles that hook lengths play in mathematics, we study the distribution of the number of $t$-hooks in the partitions of $n$. We prove that the limiting distribution is normal with mean $\mu_t(n)\sim…

Number Theory · Mathematics 2022-08-24 Michael Griffin , Ken Ono , Wei-Lun Tsai

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, 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

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

Partitions, the partition function $p(n)$, and the hook lengths of their Ferrers-Young diagrams are important objects in combinatorics, number theory and representation theory. For positive integers $n$ and $t$, we study $p_t^e(n)$ (resp.…

Number Theory · Mathematics 2022-04-19 William Craig , Anna Pun

Recent works at the interface of algebraic combinatorics, algebraic geometry, number theory, and topology have provided new integer-valued invariants on integer partitions. It is natural to consider the distribution of partitions when…

Number Theory · Mathematics 2022-04-19 Kathrin Bringmann , William Craig , Joshua Males , Ken Ono

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

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

We investigate the statistical distribution of Newtonian gravitational forces acting on a test particle embedded in an infinite, homogeneous, and uncorrelated random gas of point masses. Using order statistics, we derive the probability…

Statistical Mechanics · Physics 2026-04-21 Constantin Payerne , Vincent Rossetto

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

Fix $t \geq 2$. We first give an asymptotic formula for certain sums of the number of $t$-cores. We then use this result to compute the distribution of the size of the $t$-core of a uniformly random partition of an integer $n$. We show that…

Probability · Mathematics 2023-02-28 Arvind Ayyer , Shubham Sinha

Let $p(n)$ be the number of all integer partitions of the positive integer $n$ and let $\lambda$ be a partition, selected uniformly at random from among all such $p(n)$ partitions. It is known that each partition $\lambda$ has a unique…

Combinatorics · Mathematics 2019-12-06 Ljuben Mutafchiev

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

We establish a hook length bias between self-conjugate partitions and partitions of distinct odd parts, demonstrating that there are more hooks of fixed length $t \geq 2$ among self-conjugate partitions of $n$ than among partitions of…

Combinatorics · Mathematics 2024-06-27 Catherine Cossaboom

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

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

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

Let $p_t(a,b;n)$ denote the number of partitions of $n$ such that the number of $t$ hooks is congruent to $a \bmod{b}$. For $t\in \{2, 3\}$, arithmetic progressions $r_1 \bmod{m_1}$ and $r_2 \bmod{m_2}$ on which $p_t(r_1,m_1; m_2 n + r_2)$…

Number Theory · Mathematics 2022-06-22 Eleanor Mcspirit , Kristen Scheckelhoff

This paper proves a generalization of a conjecture of Guoniu Han, inspired originally by an identity of Nekrasov and Okounkov. The main result states that certain sums over partitions p of n, involving symmetric functions of the squares of…

Combinatorics · Mathematics 2009-04-10 Richard P. Stanley

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
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