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The paper presents a counterexample to the Hodge conjecture.

General Mathematics · Mathematics 2020-07-28 Jorma Jormakka

We provide a proof of the union-closed sets conjecture, by means of a suitable refinement of the breakthrough entropy-approach introduced by Gilmer. The novelty here is to consider a convex combination of $A$ and $A\cup B$, where $A,B$ are…

Combinatorics · Mathematics 2023-02-09 Raffaele Scandone

Several results about the union-closed sets conjecture are presented.

Combinatorics · Mathematics 2017-06-21 Yining Hu

We prove Union-Closed sets conjecture.

Combinatorics · Mathematics 2024-09-13 Vladimir Blinovsky , Llohann D Speranca

We give a counterexample to a recently conjectured variant of the Penrose inequality.

Differential Geometry · Mathematics 2026-04-30 Sven Hirsch , Yipeng Wang

In this short note we present a family of counterexamples to the King's conjecture.

Algebraic Geometry · Mathematics 2011-03-09 Mateusz Michalek

We provide a simple proof for the union-closed sets conjecture, a long-standing open problem in set theory with immediate applications to graph theory, number theory, and order-theory.

Combinatorics · Mathematics 2016-07-08 Sven Schäge

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

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

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

General Mathematics · Mathematics 2013-01-23 Renyi Ma

We prove a recent conjecture by Ulas on reducible polynomial substitutions.

Number Theory · Mathematics 2019-08-01 Peter Müller

New cases of the multiplicity conjecture are considered.

Commutative Algebra · Mathematics 2007-05-23 Juergen Herzog , Xinxian Zheng

We show that the Union-Closed Conjecture holds for the union-closed family generated by the cyclic translates of any fixed set.

Combinatorics · Mathematics 2020-12-08 James Aaronson , David Ellis , Imre Leader

The Frankl conjecture (called also union-closed sets conjecture) is one of the famous unsolved conjectures in combinatorics of finite sets. In this short note, we introduce and to some extent justify some variants of the Frankl conjecture.

Combinatorics · Mathematics 2019-07-24 Maysam Maysami Sadr

In a recent breakthrough, Gilmer proved the union closed conjecture up to a constant factor. Using Gilmer's method and additional ideas, Chase and Lovett proved an optimal result for almost union-closed set systems. Here that result is…

Combinatorics · Mathematics 2023-02-27 Raphael Yuster

Mathematicians had little idea whether the easy-to-state union-closed conjecture was true or false even after $40$ years. However, last winter saw a surge of interest in the conjecture and its variants, initiated by the contribution of a…

Combinatorics · Mathematics 2023-06-22 Stijn Cambie

In this short note we give counterexamples to several results related to extension theorems published recently.

Functional Analysis · Mathematics 2013-03-19 Constantin Zalinescu

In this note, we establish the validity of a conjecture recently proposed in Mathematics Magazine and connect it to the existing interesting results

Probability · Mathematics 2025-04-22 Yaakov Malinovsky

We give an explicit counterexample to an entanglement inequality suggested in a recent paper [quant-ph/0005126] by Benatti and Narnhofer. The inequality would have had far-reaching consequences, including the additivity of the entanglement…

Quantum Physics · Physics 2007-05-23 R. F. Werner , K. G. H. Vollbrecht

We survey the state of the union-closed sets conjecture.

Combinatorics · Mathematics 2013-10-31 Henning Bruhn , Oliver Schaudt

A set system is called union closed if for any two sets in the set system their union is also in the set system. Gilmer recently proved that in any union closed set system some element belongs to at least a $0.01$ fraction of sets, and…

Combinatorics · Mathematics 2022-11-22 Zachary Chase , Shachar Lovett
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