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We show that every Lie ideal in a unital, properly infinite C*-algebra is commutator equivalent to a unique two-sided ideal. It follows that the Lie ideal structure of such a C*-algebra is concisely encoded by its lattice of two-sided…

Operator Algebras · Mathematics 2025-06-16 Hannes Thiel

A dynamical analog of the prime ideals for simple non-commutative rings is introduced. We prove a factorization theorem for the dynamical ideals. The result is used to classify the surface knots and links in the smooth 4-dimensional…

Number Theory · Mathematics 2023-05-24 Igor Nikolaev

The purpose of this work is to extend the study of the commutative rings whose lattice of ideals can be a structure of BL-algebra as carry out by Heubo et al in 2018, to non commutative rings appointed in the work as pseudo BL-rings. We…

Rings and Algebras · Mathematics 2021-04-20 Surdive Atamewoue Tsafack , Arnaud Fobasso Tchinda , Yuming Feng , Selestin Ndjeya

The aim of this paper is to develop an approach to obtain self-adjoint extensions of symmetric operators acting on anti-dual pairs. The main advantage of such a result is that it can be applied for structures not carrying a Hilbert space…

Functional Analysis · Mathematics 2020-02-17 Zsigmond Tarcsay , Tamás Titkos

Let $R$ be a commutative ring with identity. The ring $R\times R$ can be viewed as an extension of $R$ via the diagonal map $\Delta: R \hookrightarrow R\times R$, given by $\Delta(r) = (r, r)$ for all $r\in R$. It is shown that, for any $a,…

Commutative Algebra · Mathematics 2020-05-18 Rahul Kumar , Atul Gaur

It is shown that if a bilinear map f: A x B --> C of modules over a commutative ring k is nondegenerate (i.e., if no nonzero element of A annihilates all of B, and vice versa), and A and B are Artinian, then A and B are of finite length.…

Rings and Algebras · Mathematics 2013-05-10 George M. Bergman

We prove that if R is a left Noetherian and left regular ring then the same is true for any bijective skew PBW extension A of R. From this we get Serre's Theorem for such extensions. We show that skew PBW extensions and its localizations…

Rings and Algebras · Mathematics 2013-10-25 Oswaldo Lezama , Armando Reyes

We show that a unital ring is generated by its commutators as an ideal if and only if there exists a natural number $N$ such that every element is a sum of $N$ products of pairs of commutators. We show that one can take $N \leq 2$ for…

Rings and Algebras · Mathematics 2024-04-04 Eusebio Gardella , Hannes Thiel

In this article, we study Dorroh extensions of algebras and Dorroh extensions of coalgebras. Their structures are described. Some properties of these extensions are presented. We also introduce the finite duals of algebras and modules which…

Rings and Algebras · Mathematics 2020-07-07 Lan You , Hui-Xiang Chen

Let R be a Stanley-Reisner ring (that is, a reduced monomial ring) with coefficients in a domain k, and K its associated simplicial complex. Also let D_k(R) be the ring of k-linear differential operators on R. We give two different…

Commutative Algebra · Mathematics 2014-07-08 Ketil Tveiten

This paper investigates the application of the theoretical algebraic notion of a separable ring extension, in the realm of cyclic convolutional codes or, more generally, ideal codes. We work under very mild conditions, that cover all…

Information Theory · Computer Science 2014-08-08 José Gómez-Torrecillas , F. J. Lobillo , Gabriel Navarro

We investigate bicomplex analogues of fundamental notions from classical algebraic number theory. In particular, we show that the primitive element theorem admits a natural generalization to bicomplex extensions, giving rise to two distinct…

Number Theory · Mathematics 2026-02-17 Hichem Gargoubi , Sayed Kossentini

In this paper, we give a natural braiding on the universal central extension of a crossed module of Lie algebras with a given braiding and construct the universal central extension of a braided crossed module of Lie algebras, showing that,…

Rings and Algebras · Mathematics 2019-11-27 Alejandro Fernández-Fariña , Manuel Ladra

We study noncommutative rings whose proper subrings all satisfy the same chain condition. We show that if every proper subring of a ring $R$ is right Noetherian, then $R$ is either right Noetherian or the trivial extension of $\mathbb{Z}$…

Rings and Algebras · Mathematics 2026-04-23 Nathan Blacher

Let R be an associative ring.In the paper we study n-generalized commutators of rings and prove that if R is a noncommutative prime ring and n > 2, then every nonzero n-generalized Lie ideal of R contains a nonzero ideal. Therefore, if R is…

Rings and Algebras · Mathematics 2021-06-28 Peter V. Danchev , Tsiu-Kwen Lee

The twisted homogeneous coordinate ring is one of the basic constructions of the noncommutative projective geometry of Artin, Van den Bergh, and others. Chan generalized this construction to the multi-homogeneous case, using a concept of…

Algebraic Geometry · Mathematics 2007-05-23 Dennis S. Keeler

A Lie (super)algebra with a non-degenerate invariant symmetric bilinear form will be called a NIS-Lie (super)algebra. The double extension of a NIS-Lie (super)algebra is the result of simultaneously adding to it a central element and an…

Representation Theory · Mathematics 2018-09-25 Said Benayadi , Sofiane Bouarroudj

In this paper, we investigate the attached prime ideals of inverse polynomial modules over skew Ore polynomials.

Rings and Algebras · Mathematics 2024-07-01 Sebastián Higuera , Armando Reyes

For a non-commutative domain $R$ and a multiplicatively closed set $S$ the (left) Ore localization of $R$ at $S$ exists if and only if $S$ satisfies the (left) Ore property. Since the concept has been introduced by Ore back in the 1930's,…

Rings and Algebras · Mathematics 2020-09-07 Johannes Hoffmann , Viktor Levandovskyy

S-expansions of three-dimensional real Lie algebras are considered. It is shown that the expansion operation allows one to obtain a non-unimodular Lie algebra from a unimodular one. Nevertheless S-expansions define no ordering on the…

Mathematical Physics · Physics 2012-12-11 Maryna Nesterenko