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The paper presents a counterexample to the Hodge conjecture.

General Mathematics · Mathematics 2020-07-28 Jorma Jormakka

The note complements topological aspects of the theory of chiral algebras.

Quantum Algebra · Mathematics 2007-11-19 A. Beilinson

The aim of this short note is to give counterexamples to two results by D. Y. Gao [5, Th. 16], [4, Th. 2] and to improve a related result by S.-C. Fang, D. Y. Gao, R.-L. Sheu and S.-Y. Wu [1, Th. 3].

Optimization and Control · Mathematics 2010-08-26 M. D. Voisei , C. Zalinescu

In this short note we prove by a counter-example that Theorem 3.2 in the paper "A study on concave optimization via canonical dual function" by J. Zhu, S. Tao, D. Gao is false; moreover, we give a very short proof for Theorem 3.1 in the…

Optimization and Control · Mathematics 2011-12-12 C. Zalinescu

Provides a counterexample to a long standing conjecture of A. Adem regarding the behaviour of the integral cohomology of a p-group.

Algebraic Topology · Mathematics 2007-05-23 Jonathan Pakianathan

A corrigendum of a former result on semisimplicity of the category of integrable modules of a q-boson algebra is given with a counter example.

Quantum Algebra · Mathematics 2009-04-14 Youjun Tan

For the cluster algebra $\mathcal{A}$ associated with a triangulated surface, we give a characterization of the triangulated surface such that different non-initial cluster monomials in $\mathcal{A}$ have different $f$-vectors. Similarly,…

Representation Theory · Mathematics 2024-10-02 Toshiya Yurikusa

The paper has been withdrawn due to a crucial error in section 3.

Rings and Algebras · Mathematics 2016-09-08 Mariana Haim , Blas Torrecillas

In this note, the correction to the proof of one theorem in some our previous paper [arXiv:1302.0589] will be given.

Rings and Algebras · Mathematics 2020-02-18 Bui Xuan Hai

In this paper, we give a different proof of the fact that the $C^{*}$ algebra of the odd dimensional quantum spheres is a groupoid $C*}$ algebra. We use the theory of inverse semigroups to reconstruct the groupoid given by Sheu in [6].

Operator Algebras · Mathematics 2011-04-26 S. Sundar

Let A be the moduli space of (1,p)-polarised abelian surfaces with a level structure, for p an odd prime. Let X be a desingularisation of any algebraic compactification of A. Then X is simply-connected.

alg-geom · Mathematics 2008-02-03 K. Hulek , G. K. Sankaran

We show that the inverse group of equivalence classes of metrics on two copies of a metric space is fundamental.

Metric Geometry · Mathematics 2025-12-18 Vladimir Manuilov

We give a proof for the fundamental theorem of algebra,using the Fredholm index phenomena

Functional Analysis · Mathematics 2008-02-12 Ali Taghavi

In this note, we establish some new results on some special types of function algebras and also give new proofs to some existing ones

Functional Analysis · Mathematics 2025-10-28 Murphy E. Egwe , Funke Yusuf

We modify the proof of the basic lemma of a paper of Saks and Zygmund on additive functions of rectangles.

Analysis of PDEs · Mathematics 2025-03-31 Julià Cufí , Juan J. Donaire

This note provides a new approach to a result of Foregger and related earlier results by Keilson and Eberlein. Using quite different techniques, we prove a more general result from which the others follow easily. Finally, we argue that the…

Optimization and Control · Mathematics 2013-03-22 Alexander Kovačec , Salma Kuhlmann , Cordian Riener

Drawing inspiration from both the classical Guerino Mazzola's symmetry-based model for first-species counterpoint (one note against one note) and Johann Joseph Fux's "Gradus ad Parnassum", we propose an extension for second-species (two…

History and Overview · Mathematics 2022-07-06 Octavio A. Agustín-Aquino , Guerino Mazzola

In this short note,we correct a well-known counter example of the famous book of Dacorogna[2].

Functional Analysis · Mathematics 2018-11-29 Yan Tang , Shiqing Zhang

The $F$-triangle is a refined face count for the generalised cluster complex of Fomin and Reading. We compute the $F$-triangle explicitly for all irreducible finite root systems. Furthermore, we use these results to partially prove the…

Combinatorics · Mathematics 2007-05-23 Christian Krattenthaler

In this note we provide important and significant observations in ring theory related to weakly tripotent rings. We provide counterexamples for the structure theorem for commutative weakly tripotent rings appeared in arXiv (2017) and Bull.…

Rings and Algebras · Mathematics 2026-02-09 Santosh Kumar Pandey
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