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The number of parts in the partitions (resp. distinct partitions) of $n$ with parts from a set were considered. Its generating functions were obtained. Consequently, we derive several recurrence identities for the following functions: the…

Number Theory · Mathematics 2025-09-29 A. David Christopher

In this paper we find a new lower bound on the number of imaginary quadratic extensions of the function field $\mathbb{F}_{q}(x)$ whose class groups have elements of a fixed odd order. More precisely, for $q$, a power of an odd prime, and…

Number Theory · Mathematics 2011-02-21 Pradipto Banerjee , Srinivas Kotyada

In 2016, in the work related to Galois representations, Greenberg conjectured the existence of multi-quadratic $p$-rational number fields of degree $2^{t}$ for any odd prime number $p$ and any integer $t \geq 1$. Using the criteria provided…

Number Theory · Mathematics 2022-08-09 Jaitra Chattopadhyay , H Laxmi , Anupam Saikia

Let $\mathrm{pod}_{-4}(n)$ denote the number of partition quadruples of $n$ where the odd parts in each partition are distinct. We find many arithmetic properties of $\mathrm{pod}_{-4}(n)$ involving the following infinite family of…

Number Theory · Mathematics 2015-11-04 Liuquan Wang

In this paper, we investigate the combinatorial properties of three classes of integer partitions: (1) $s$-modular partitions, a class consisting of partitions into parts with a number of occurrences (i.e., multiplicity) congruent to $0$ or…

Combinatorics · Mathematics 2024-09-05 Mohammed L. Nadji , Ahmia Moussa

We show that integer partitions, the fundamental building blocks in additive number theory, detect prime numbers in an unexpected way. Answering a question of Schneider, we show that the primes are the solutions to special equations in…

Number Theory · Mathematics 2024-07-11 William Craig , Jan-Willem van Ittersum , Ken Ono

A triangular partition is a partition whose Ferrers diagram can be separated from its complement (as a subset of $\mathbb{N}^2$) by a straight line. Having their origins in combinatorial number theory and computer vision, triangular…

Combinatorics · Mathematics 2023-12-29 Sergi Elizalde , Alejandro B. Galván

We compute the $3$-class groups $A_n$ of the fields $F_n$ in the cyclotomic $\mathbf{Z}_3$-extensions of the real quadratic fields of discriminant $f<100,000$. In all cases the orders of $A_n$ remain bounded as $n$ goes to infinity. This is…

Number Theory · Mathematics 2025-03-04 Pietro Mercuri , Maurizio Paoluzi , René Schoof

Let $p_n$ be the number of partitions of an integer $n$. For each of the partition statistics of counting their parts, ranks, or cranks, there is a natural family of integer polynomials. We investigate their asymptotics and the limiting…

Combinatorics · Mathematics 2007-11-12 Robert P. Boyer , William M. Y. Goh

In this article, we introduce the notion of almost consecutive partitions. A partition is almost consecutive if every term is consecutive, with the possible exception of the smallest one. We find formulas relating to the smallest parts of…

Combinatorics · Mathematics 2024-03-26 Rajat Gupta , Noah Lebowitz-Lockard

We consider sequences of integers defined by a system of linear inequalities with integer coefficients. We show that when the constraints are strong enough to guarantee that all the entries are nonnegative, the generating function for the…

Combinatorics · Mathematics 2007-05-23 S. Corteel , C. D. Savage

It is known that infinitely many number fields and function fields of any degree $m$ have class number divisible by a given integer $n$. However, significantly less is known about the indivisibility of class numbers of such fields. While…

Number Theory · Mathematics 2009-06-22 Michael Daub , Jaclyn Lang , Mona Merling , Allison M. Pacelli , Natee Pitiwan , Michael Rosen

Let $h_{(m,k)}$ be the class number of $\mathbb{Q}(\sqrt{1-2m^k}).$ We prove that for any odd natural number $k,$ there exists $m_0$ such that $k \mid h_{(m,k)}$ for all odd $m > m_0.$ We also prove that for any odd $m \geq 3,$ $k \mid…

Number Theory · Mathematics 2024-03-06 Srilakshmi Krishnamoorthy , R. Muneeswaran

Iizuka's conjecture predicts that, given $m \in \mathbb{N}$ and a prime $p$, there exists infinitely many integers $n$ such that the class numbers of \textit{all} of the following quadratic number fields, \[ \mathbb{Q}(\sqrt{n}),\…

Number Theory · Mathematics 2025-08-12 Muneeswaran R , Srilakshmi Krishnamoorthy , Subham Bhakta

In this article, we study necessary conditions for certain square-free integers to be congruent numbers. Our method uses divisibility properties of class numbers of related imaginary quadratic fields. We first consider positive square-free…

Number Theory · Mathematics 2026-04-28 Shamik Das , Debajyoti De , Sudipa Mondal

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

In this article, we first investigate the partitions whose parts are congruent to $a$ or $b$ modulo $k$ with the aid of separable integer partition classes with modulus $k$ introduced by Andrews. Then, we introduce the…

Combinatorics · Mathematics 2024-07-01 Thomas Y. He , C. S. Huang , H. X. Li , X. Zhang

We link the theory of optimal transportation to the theory of integer partitions. Let $\mathscr P(n)$ denote the set of integer partitions of $n \in \mathbb N$ and write partitions $\pi \in \mathscr P(n)$ as $(n_1, \dots, n_{k(\pi)})$.…

Number Theory · Mathematics 2017-04-07 Sonja Hohloch

Let p be a prime number which is split in an imaginary quadratic field k. Let \mathfrak{p} be a place of k above p. Let k_\infty be the unique Z_p-extension of k which unramified outside of \mathfrak{p}, and let K_\intfy be a finite…

Number Theory · Mathematics 2011-04-21 Stéphane Viguié

We construct an infinite family of imaginary quadratic number fields with 2-class groups of type (2,2,2) whose Hilbert 2-class fields are finite.

Number Theory · Mathematics 2013-10-25 Franz Lemmermeyer