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In this note, we propose a conjecture stating that some series involving primitive sequences are convergent. Then, we show (by a counterexample) that the analogue of a conjecture of Erd\H{o}s, for those series, is false.

Number Theory · Mathematics 2017-09-25 Bakir Farhi

This paper describes a method used to construct infinitely many probable counterexamples of the abc conjecture over the rational integers.

Number Theory · Mathematics 2007-05-23 N. A. Carella

In this paper, we formulate and prove several variants of the Erd\H{o}s-Tur\'{a}n additive bases conjecture.

General Mathematics · Mathematics 2026-03-13 Theophilus Agama

The article provides a counterexample to a conjecture by Blocki-Zwonek.

Complex Variables · Mathematics 2015-07-20 John Erik Fornæss

We provide empirical evidence for the Erd\H{o}s-Straus conjecture by improving computational bounds to $10^{18}$ and by evaluating the solution-counting function $f(p)$ for this conjecture.

Number Theory · Mathematics 2025-09-03 Spiridon Mihnea , Dumitru C. Bogdan

The paper presents a counterexample to the Hodge conjecture.

General Mathematics · Mathematics 2020-07-28 Jorma Jormakka

We provide a proof and a counterexample to two conjectures made by N. Kuznetsov.

Analysis of PDEs · Mathematics 2023-11-21 Florian Oschmann

In this paper, we give a simple counter example to the famous Hodge conjecture.

General Mathematics · Mathematics 2013-01-23 Renyi Ma

In this paper we propose counterexamples to the Geometrization Conjecture and the Elliptization Conjecture.

Geometric Topology · Mathematics 2007-05-23 Sze Kui Ng

A strictly increasing sequence $\mathscr{A}$ of positive integers is said to be primitive if no term of $\mathscr{A}$ divides any other. Erd\H{o}s showed that the series $\sum_{a \in \mathscr{A}} \frac{1}{a \log a}$, where $\mathscr{A}$ is…

Number Theory · Mathematics 2017-11-28 Bakir Farhi

We investigate the famous conjecture by Erd\H os-Simonovits and Sidorenko using information theory. Our method gives a unified treatment for all known cases of the conjecture and it implies various new results as well. Our topological type…

Combinatorics · Mathematics 2015-01-27 Balazs Szegedy

In this paper, we prove the conjecture that if there is an odd perfect number, then there are infinitely many of them.

Number Theory · Mathematics 2022-02-10 Jose Arnaldo Bebita Dris

In this short note we present some remarks and conjectures on two of Erd\"os's open problems in number theory.

General Mathematics · Mathematics 2007-05-23 Florentin Smarandache

We give counterexamples to Okounkov's log-concavity conjecture for Littlewood-Richardson coefficients.

Representation Theory · Mathematics 2007-05-23 Calin Chindris , Harm Derksen , Jerzy Weyman

In this paper we show that every set $A \subset \mathbb{N}$ with positive density contains $B+C$ for some pair $B,C$ of infinite subsets of $\mathbb{N}$, settling a conjecture of Erd\H{o}s. The proof features two different decompositions of…

Combinatorics · Mathematics 2019-06-14 Joel Moreira , Florian Karl Richter , Donald Robertson

We provide a broad class of counterexamples to a conjecture of L. de Branges concerning the superfluity of the continuity property in the axiomatic description of de Branges spaces.

Functional Analysis · Mathematics 2025-07-18 Igor Bereza

In this paper we prove the validity of a formula for computing the Alexander invariant which was originally conjectured by Bar-Natan and Dancso in [BND].

Geometric Topology · Mathematics 2012-10-10 Peter Lee

In the recent article arXiv:1606.03351, Apagodu and Zeilberger discuss some applications of an algorithm for finding and proving congruence identities (modulo primes) of indefinite sums of many combinatorial sequence. At the end they…

Combinatorics · Mathematics 2016-06-30 Roberto Tauraso

We expand upon the notion of bottlenecking introduced in our earlier work, characterizing a spectrum of graphs and showing that this naturally extends to a concept of coarse bottlenecking. We show how the notion of bottlenecking provides a…

Metric Geometry · Mathematics 2024-10-23 Michael Bruner , Atish Mitra , Heidi Steiger

We consider several old problems involving the number of prime divisors function $\omega(n)$, as well as the related functions $\Omega(n)$ and $\tau(n)$. Firstly, we show that there are infinitely many positive integers $n$ such that…

Number Theory · Mathematics 2026-04-28 Terence Tao , Joni Teräväinen
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