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Freiman and Scourfield proved that any large enough integer can be written as a sum of a certain number of ascending even powers. We use the circle method to provide the first explicit bound on this number, and show that any large enough…

Number Theory · Mathematics 2020-01-09 Chan Ieong Kuan , Didier Lesesvre , Xuanxuan Xiao

"Goldbach's Conjecture" proven by analysis of how all combinations of the odd primes, summed in pairs, generates all of the even numbers.

General Mathematics · Mathematics 2007-05-23 Roger Ellman

Let $\theta > 11/20$. We prove that every sufficiently large odd integer $n$ can be written as a sum of three primes $n = p_1 + p_2 + p_3$ with $|p_i - n/3| \leq n^{\theta}$ for $i\in\{1,2,3\}$.

Number Theory · Mathematics 2017-05-04 Kaisa Matomäki , James Maynard , Xuancheng Shao

We prove that every sufficiently large odd integer can be expressed as a sum of one square and fourteen fifth powers, all of primes. In addition, we establish that every sufficiently large even integer can be written as a sum of one square,…

Number Theory · Mathematics 2026-03-09 Geovane Matheus Lemes Andrade

Let $\mathcal{P}_r$ denote an almost-prime with at most $r$ prime factors, counted according to multiplicity. In this paper, it is proved that for every sufficiently large even integer $N$, the equation \begin{equation*}…

Number Theory · Mathematics 2018-01-03 Jinjiang Li , Min Zhang

Let c > 0.55. Every large n can be written in the form p +ab, where p is prime, a and b are significantly smaller than x^1/2 and ab is less than n^c. This strengthens a result of Heath-Brown, which has the requirement c>3/4. We introduce…

Number Theory · Mathematics 2020-11-24 Roger Baker , Glyn Harman

We prove new results on the additive theory of reversed primes $\overleftarrow{p}$; that is, primes $p$ which are written backwards in a fixed base $b\geq 2$. In particular, we study a variant of Goldbach's conjecture, looking at…

Number Theory · Mathematics 2026-05-22 Michael Harm , Daniel R. Johnston

In this paper we prove two results concerning Vinogradov's three primes theorem with primes that can be called almost twin primes. First, for any $m$, every sufficiently large odd integer $N$ can be written as a sum of three primes $p_1,…

Number Theory · Mathematics 2019-02-20 Kaisa Matomäki , Xuancheng Shao

Let $q_n$ denote the $n^{th}$ number that is a product of exactly two distinct primes. We prove that $$\liminf_{n\to \infty} (q_{n+1}-q_n) \le 6.$$ This sharpens an earlier result of the authors (arXivMath NT/0506067), which had 26 in place…

Number Theory · Mathematics 2014-02-26 D. A. Goldston , S. W. Graham , J. Pintz , C. Y. Yildirim

Inspired by the proof of the Bertrand postulate given by P. Erd\H{o}S, we carefully examine and solve one less usual inequality in positive integers which could help to find an arithmetically pure proof that for every positive integer…

Number Theory · Mathematics 2025-03-06 Barbora Batíková , Tomáš J. Kepka , Petr C. Němec

The Green-Tao Theorem, one of the most celebrated theorems in modern number theory, states that there exist arbitrarily long arithmetic progressions of prime numbers. In a related but different direction, a recent theorem of Shiu proves…

Number Theory · Mathematics 2014-07-07 Keenan Monks , Sarah Peluse , Lynnelle Ye

We show that every $N \geq 2$ can be written as the sum of positive integers $a$ and $b$ where $\Omega(ab) \leq 40$. The result is obtained through the direct application of an explicit lower bound Selberg sieve along with some computation…

Number Theory · Mathematics 2026-05-12 Adrian Dudek , Lachlan Dunn

Dirichlet's proof of infinitely many primes in arithmetic progressions was published in 1837, introduced L-series for the first time, and it is said to have started rigorous analytic number theory. Dirichlet uses Euler's earlier work on the…

History and Overview · Mathematics 2014-11-25 Peter Gustav Lejeune Dirichlet

A classical theorem in number theory due to Euler states that a positive integer $z$ can be written as the sum of two squares if and only if all prime factors $q$ of $z$, with $q\equiv 3 \pmod{4}$, have even exponent in the prime…

Number Theory · Mathematics 2014-04-02 Joshua Harrington , Lenny Jones , Alicia Lamarche

Assuming the Riemann Hypothesis, we prove that for all $x\geq 2$, there exists at least one even integer within the interval $(x, x+123\log^2x]$, that can be expressed as the sum of two primes. This result is an improvement over the recent…

Number Theory · Mathematics 2025-12-30 Andrés Chirre , Markus Valås Hagen

For any integer $r \geq 1$, the sequence of numbers $\{{c^{(r)}_{k}}\}_{k \geq 0} $ is defined implicitly by [\sum_k\binom{n}{k}^r\binom{n+k}{k}^r = \sum_k\binom{n}{k}\binom{n+k}{k}c^{(r)}_k,\quad n=0,1,2,...] Asmus Schmidt conjectured that…

Combinatorics · Mathematics 2013-08-07 Thotsaporn "Aek" Thanatipanonda

In this paper, we proved a theorem that every large enough odd number can be represented as the sum of three almost equal Piatetski-Shapiro primes.

Number Theory · Mathematics 2020-12-14 Yanbo Song

Euler had considered the problem of finding three integers whose sum, product, and also the sum of the products of the integers, taken two at a time, are all perfect squares. Euler's methods of solving the problem lead to parametric…

Number Theory · Mathematics 2025-05-27 Ajai Choudhry

In 1845, Bertrand conjectured that for all integers $x\ge2$, there exists at least one prime in $(x/2, x]$. This was proved by Chebyshev in 1860, and then generalized by Ramanujan in 1919. He showed that for any $n\ge1$, there is a…

Number Theory · Mathematics 2014-12-16 Nadine Amersi , Olivia Beckwith , Steven J. Miller , Ryan Ronan , Jonathan Sondow

In 2021, Chen proved a congruence for the degree of a certain map on the space of covers of elliptic curves. He concluded as a corollary that the size of any connected component of the Markoff mod $p$ graph is divisible by $p$. In…

Number Theory · Mathematics 2025-02-25 Daniel E. Martin