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Despite the failure of the integral Hodge conjecture, we show that the rational Hodge conjecture implies an integral version (modulo torsion) of the absolute Hodge conjecture.

Algebraic Geometry · Mathematics 2018-10-26 Ryan Keast

In this note, we use the method of [3] to give a simple proof of famous Witten conjecture. Combining the coefficients derived in our note and this method, we can derive more recursion formulas of Hodge integrals.

Algebraic Geometry · Mathematics 2007-05-23 Lin Chen , Yi Li , Kefeng Liu

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

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

A short, fairly self-contained proof is given of the Poincar\'e Conjecture. In the previous version there was an error on Page 8. This gap has now been filled.

General Mathematics · Mathematics 2025-09-26 M. J. Dunwoody

In this note we record a comparison theorem on the B-model variation of semi-infinite Hodge structures. This result is considered a folklore theorem by experts in the field. We only take this opportunity to write it down. Our motivation is…

Algebraic Geometry · Mathematics 2024-04-23 Junwu Tu

We discuss a construction that gives counterexamples to various questions of unique determination of convex bodies.

Metric Geometry · Mathematics 2012-01-04 Dmitry Ryabogin , Vlad Yaskin

In this short note we report on results on a computational search for a counterexample to the strong coincidence conjecture. In particular, we discuss the method used so that further searches can be conducted.

Dynamical Systems · Mathematics 2017-06-19 Scott Balchin

In this paper we use computational methods to disprove a conjecture by Alaoglu and Erd\H{o}s regarding the superabundant numbers.

Number Theory · Mathematics 2020-09-09 Tibor Burdette , Ian Stewart

We give a simple proof of a recently result concerning Hardy $q$-inequalities.

Classical Analysis and ODEs · Mathematics 2014-12-18 Peng Gao

Nous refutons, sous une certaine hypothese combinatoire, la "nonrevisiting path conjecture". Abstract: In this article, we give, under some hypothesis, a couterexample to the nonrevisiting path conjecture.

Combinatorics · Mathematics 2007-05-23 Frederic Bosio

We provide a short proof of the 1-dimensional flat chain conjecture.

Metric Geometry · Mathematics 2026-04-01 Philippe Bouafia , Thierry De Pauw

We prove the numerical Hodge standard conjecture for the square of a simple abelian variety of prime dimension, and also in some related cases.

Algebraic Geometry · Mathematics 2022-02-09 Teruhisa Koshikawa

In this article, we give two different proofs of why the Collatz Conjecture is false.

General Mathematics · Mathematics 2022-04-19 Maya Mohsin Ahmed

We provide a counterexample to the Lagrangian Poincar\'e recurrence conjecture of Ginzburg and Viterbo in all dimensions $6$ and greater.

Symplectic Geometry · Mathematics 2024-10-10 Filip Broćić , Egor Shelukhin

In the paper we complete a case by case proof of Reeder's Conjecture started in our previous work, proving the conjecture for simple Lie algebras of type $D$ and for the exceptional cases.

Representation Theory · Mathematics 2021-08-17 Sabino Di Trani

We give an elementary proof to Hasse theorem.

General Mathematics · Mathematics 2012-12-12 Jianhua Chen , Debiao He , Zhijin Hu , Yitao Chen , Hao Hu

In the current note, we present a new, short proof of the famous AM-GM-HM inequality using only induction and basic calculus.

General Mathematics · Mathematics 2022-06-06 Konstantinos Gaitanas

I give simple elementary proofs for some well-known Hankel determinants and their q-analogues.

Combinatorics · Mathematics 2009-02-11 Johann Cigler

We present in this work a new and simple proof of the false centre theorem.

Metric Geometry · Mathematics 2021-10-28 Luis Montejano , Efren Morales-Amaya

We give a counterexample to the PIA (precise inversion of adjunction) conjecture for minimal log discrepancies. We also give a counterexample to the LSC conjecture for families.

Algebraic Geometry · Mathematics 2026-05-01 Yusuke Nakamura , Kohsuke Shibata