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In this paper, we use the idempotent decomposition to give an explicit isomorphism from an arbitrary semisimple Artinian ring to an external direct sum of finitely many full matrix rings over division rings.

Representation Theory · Mathematics 2024-08-01 Sheng Gao

We prove that in a connected group of finite Morley rank the centralizers of decent tori are connected. We then apply this result to the analysis of minimal connected simple groups of finite Morley rank. Our applications include general…

Logic · Mathematics 2014-02-26 Tuna Altinel , Jeffrey Burdges

We give a new proof of the finiteness of maximal arithmetic reflection groups. Our proof is novel in that it makes no use of trace formulas or other tools from the theory of automorphic forms and instead relies on the arithmetic Margulis…

Geometric Topology · Mathematics 2022-07-04 David Fisher , Sebastian Hurtado

We give a new proof of the Mordell-Lang conjecture in positive characteristic for finitely generated subgroups. We also make some progress towards the full Mordell-Lang conjecture in positive characteristic.

Number Theory · Mathematics 2013-12-02 Paul Ziegler

We prove that the invariably generating graph of a finite group can have an arbitrarily large number of connected components with at least two vertices.

Group Theory · Mathematics 2021-02-15 Daniele Garzoni

We show that every finite simple group is generated invariably by a Sylow subgroup and a cyclic group. It follows that that the order complex of the coset poset of an arbitrary finite group has nontrivial reduced rational homology.

Group Theory · Mathematics 2024-08-05 Robert M. Guralnick , John Shareshian , Russ Woodroofe

On August 5, 2005 in the American Mathematical Society Summer Institute on Algebraic Geometry in Seattle and later in several conferences I gave lectures on my analytic proof of the finite generation of the canonical ring for the case of…

Algebraic Geometry · Mathematics 2007-05-23 Yum-Tong Siu

We prove that the cohomology ring of a finite-dimensional restricted Lie superalgebra over a field of characteristic $p > 2$ is a finitely-generated algebra. Our proof makes essential use of the explicit projective resolution of the trivial…

Representation Theory · Mathematics 2013-09-10 Christopher M. Drupieski

The well known Andrews-Curtis Conjecture [2] is still open. In this paper, we establish its finite version by describing precisely the connected components of the Andrews-Curtis graphs of finite groups. This finite version has independent…

Group Theory · Mathematics 2011-03-08 Alexandre V. Borovik , Alexander Lubotzky , Alexei G. Myasnikov

We prove the finiteness of $B$-representations of generalised log canonical pairs. As a consequence, we prove that, the (relative) abundance for a generalised semi-log canonical pair is implied by the abundance for its normalisation.…

Algebraic Geometry · Mathematics 2021-03-23 Zhengyu Hu

In this paper we show that for a torsion-free abelian group $G$, $\operatorname{rank}_\mathbb{Z}G<\infty$ if and only if there exists a Noetherian $G$-graded ring $R$ such that the set $\{R_g \neq 0\}$ generates the group $G$. For every $G$…

Commutative Algebra · Mathematics 2025-08-11 Cheng Meng

We identify quotient polynomial rings isomorphic to the recently found fundamental fusion algebras of logarithmic minimal models.

High Energy Physics - Theory · Physics 2008-11-26 Jorgen Rasmussen , Paul A. Pearce

It is proved that every finitely generated profinite group with fewer than $2^{\aleph_0}$ conjugacy classes of elements of infinite order is finite

Group Theory · Mathematics 2022-09-30 John S. Wilson

Some projective wonderful models for the complement of a toric arrangement in a n-dimensional algebraic torus T were constructed in [3]. In this paper we describe their integer cohomology rings by generators and relations.

Algebraic Topology · Mathematics 2019-02-13 Corrado De Concini , Giovanni Gaiffi

Two finitely generated monoids are constructed, one finitely presented the other not, whose (directed, unlabelled) Cayley graphs are isomorphic.

Group Theory · Mathematics 2016-10-18 J. Awang , M. Pfeiffer , N. Ruskuc

Let $G$ be the linear algebraic group $SL_3$ over a field $k$ of characteristic two. Let $A$ be a finitely generated commutative $k$-algebra on which $G$ acts rationally by $k$-algebra automorphisms. We show that the full cohomology ring…

Representation Theory · Mathematics 2007-10-10 Wilberd van der Kallen

We carry out a study of groups $G$ in which the index of any infinite subgroup is finite. We call them restricted-finite groups and characterize finitely generated not torsion restricted-finite groups. We show that every infinite…

Group Theory · Mathematics 2023-05-02 B. Taeri , M. R. Vedadi

We present a new proof of the Joints Theorem without taking derivatives. Then we generalize the proof to prove the Multijoints Conjecture and Carbery's generalization. All results are in any dimension over an arbitrary field.

Combinatorics · Mathematics 2017-05-10 Ruixiang Zhang

Local log-regular rings are a certain class of Cohen-Macaulay local rings that are treated in logarithmic geometry. Our paper aims to provide purely commutative ring theoretic proof of some ring-theoretic properties of local log-regular…

Commutative Algebra · Mathematics 2025-04-08 Shinnosuke Ishiro

Let $S$ be a submonoid of a free Abelian group of finite rank. We show that if $k$ is a field of prime characteristic such that the monoid $k$-algebra $k[S]$ is split $F$-regular, then $k[S]$ is a finitely generated $k$-algebra, or…

Commutative Algebra · Mathematics 2025-03-31 Rankeya Datta , Karl Schwede , Kevin Tucker
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