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Related papers: Hook Length Biases in $t$-Core Partitions

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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

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

We exactly determine the maximum possible hook length of $(s,t)$-core partitions with $d$-distinct parts when there are finitely many such partitions. Moreover, we provide an algorithm to construct a $d$-distinct $(s,t)$-core partition with…

Combinatorics · Mathematics 2022-09-22 Ethan Pesikoff , Benjamin Przybocki , Janabel Xia

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

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

There is a well-studied correspondence by Jaclyn Anderson between partitions that avoid hooks of length s or t and certain binary strings of length s+t. Using this map, we prove that the total size of a random partition of this kind…

Combinatorics · Mathematics 2021-09-14 Chaim Even-Zohar

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

We give relations between the joint distributions of multiple hook lengths and of frequencies and part sizes in partitions, extending prior work in this area. These results are discovered by investigating truncations of the…

Combinatorics · Mathematics 2019-01-01 Emily E. Anible , William J. Keith

This paper shows that the number of hooks of length k contained in all partitions of n equals k times the number of parts of length k in all partitions of n. It contains also formulas for the moments (under uniform distribution) of k-th…

Combinatorics · Mathematics 2007-05-23 Roland Bacher , Laurent Manivel

Recently, Blecher and Knopfmacher applied the notion of fixed points to integer partitions. This has already been generalized and refined in various ways such as $h$-fixed points for an integer parameter $h$ by Hopkins and Sellers. Here, we…

Combinatorics · Mathematics 2024-12-25 Philip Cuthbertson , David J. Hemmer , Brian Hopkins , William J. Keith

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

An integer partition of a positive integer $n$ is called to be $t$-core if none of its hook lengths are divisible by $t$. Recently, Gireesh, Ray and Shivashankar [`A new analogue of $t$-core partitions', \textit{Acta Arith.} \textbf{199}…

Number Theory · Mathematics 2024-05-01 Pranjal Talukdar

A conjecture on the monotonicity of t-core partitions in an article of Stanton [Open positivity conjectures for integer partitions, Trends Math., 2:19-25, 1999] has been the catalyst for much recent research on t-core partitions. We…

Number Theory · Mathematics 2015-03-20 Christopher R. H. Hanusa , Rishi Nath

A tremendous amount of research has been done in the last two decades on $(s,t)$-core partitions when $s$ and $t$ are positive integers with no common divisor. Here we change perspective slightly and explore properties of $(s,t)$-core and…

Combinatorics · Mathematics 2024-05-31 Jean-Baptiste Gramain , Rishi Nath , James A. Sellers

We introduce the hook length expansion technique and explain how to discover old and new hook length formulas for partitions and plane trees. The new hook length formulas for trees obtained by our method can be proved rather easily, whereas…

Combinatorics · Mathematics 2008-05-19 Guo-Niu Han

Recently, the first author generalized a formula of Nekrasov and Okounkov which gives a combinatorial formula, in terms of hook lengths of partitions, for the coefficients of certain power series. In the course of this investigation, he…

Number Theory · Mathematics 2008-05-19 Guo-Niu Han , Ken Ono

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

For a positive integer $t \geq 2$, the $t$-core of a partition plays an important role in modular representation theory and combinatorics. We initiate the study of $t$-cores of partitions contained in an $r \times s$ rectangle. Our main…

Combinatorics · Mathematics 2024-04-30 Arvind Ayyer , Shubham Sinha

We give a bijection between the set of self-conjugate partitions and that of ordinary partitions. Also, we show the relation between hook lengths of self conjugate partition and corresponding partition via the bijection. As a corollary, we…

Combinatorics · Mathematics 2018-11-27 Hyunsoo Cho , JiSun Huh , Jaebum Sohn

Jaclyn Anderson proved that if s and t are relatively prime positive integers, then there are exactly (s+t-1)!/(s!t!) partitions whose set of hook-lengths is disjoint from the set {s,t}. Drew Armstrong conjectured (and Paul Johnson, and a…

Combinatorics · Mathematics 2015-09-03 Shalosh B. Ekhad , Doron Zeilberger