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Let $A$ and $B$ be two connected graded algebras finitely generated in degree one. If $A$ is isomorphic to $B$ as ungraded algebras, then they are also isomorphic to each other as graded algebras.

Rings and Algebras · Mathematics 2015-09-30 Jason Bell , James J. Zhang

Let A and B be finite dimensional simple real algebras with division gradings by an abelian group G. In this paper we give necessary and sufficient conditions for the coincidence of the graded identities of A and B. We also prove that every…

Rings and Algebras · Mathematics 2016-02-29 Yuri Bahturin , Diogo Diniz Pereira da Silva e Silva

The purpose of this article is to develop an algebraic approach to the problem of integrable classification of differential-difference equations with one continuous and two discrete variables. As a classification criterion, we put forward…

Exactly Solvable and Integrable Systems · Physics 2021-08-11 I. T. Habibullin , A. R. Khakimova

In this paper we discuss some of the recent developments on derived equivalences in algebraic geometry.

Algebraic Geometry · Mathematics 2007-05-23 Lutz Hille , Michel Van den Bergh

We give a geometric classification of 4-dimensional superalgebras over an algebraic closed field.

Rings and Algebras · Mathematics 2013-03-22 Aaron Armour , Yinhuo Zhang

We give a complete classification of all $d$-representation-finite symmetric Nakayama algebras and of all $d$-representation-finite trivial extensions of path algebras of quivers, over an arbitrary field. As a consequence we get a…

Representation Theory · Mathematics 2026-04-08 Erik Darpö , Tor Kringeland

In this article we define $G$-algebras, that is, graded algebras on which a reductive group $G$ acts as gradation preserving automorphisms. Starting from a finite dimensional $G$-module $V$ and the polynomial ring $\mathbb{C}[V]$, it is…

Rings and Algebras · Mathematics 2016-05-31 Kevin De Laet

Let $\mathfrak{g}$ be a reductive Lie algebra over an algebraically closed, characteristic zero field or over $\mathbb{R}$. Let $\mathfrak{q}$ be a parabolic subalgebra of $\mathfrak{g}$. We characterize the derivations of $\mathfrak{q}$ by…

Rings and Algebras · Mathematics 2015-11-03 Daniel Brice

We describe differential invariants of infinite-dimensional algebras being equivalence algebras of some classes of PDE and study structure of these algebras.

Mathematical Physics · Physics 2009-10-13 Irina Yehorchenko

We introduce the notion of a generalized metric n-Leibniz algebra and show that there is a one-to-one correspondence between generalized metric n-Leibniz algebras and faithful generalized orthogonal representations of metric Lie algebras…

Rings and Algebras · Mathematics 2021-03-16 Li-Na Song , Rong Tang

The bounded derived category of a finite dimensional algebra of finite global dimension is equivalent the stable category of $\mathbb{Z}$-graded modules over its trivial extension \cite{Happel}. In particular, given two derived equivalent…

Representation Theory · Mathematics 2024-02-20 Valentine Soto

We extend the classification of solvable Lie algebras with abelian nilradicals to classify solvable Leibniz algebras which are one dimensional extensions of an abelian nilradicals.

Rings and Algebras · Mathematics 2014-10-02 Lindsey Bosko-Dunbar , Matthew Burke , Jonathan D. Dunbar , J. T. Hird , Kristen Stagg Rovira

We develop a new connection between Differential Algebra and Geometric Invariant Theory, based on an anti-equivalence of categories between solution algebras associated to a linear differential equation (i.e. differential algebras generated…

Algebraic Geometry · Mathematics 2012-07-17 Yves Andre

A Galois theory of differential fields with parameters is developed in a manner that generalizes Kolchin's theory. It is shown that all connected differential algebraic groups are Galois groups of some appropriate differential field…

Exactly Solvable and Integrable Systems · Physics 2007-07-25 Peter Landesman

In this paper we show that the method for describing solvable Lie algebras with given nilradical by means of non-nilpotent outer derivations of the nilradical is also applicable to the case of Leibniz algebras. Using this method we extend…

Rings and Algebras · Mathematics 2012-03-22 J. M. Casas , M. Ladra , B. A. Omirov , I. A. Karimjanov

We show in this paper that the set of irreducible components of the family of Galois coverings of P^1_C with Galois group isomorphic to D_n is in bijection with the set of possible numerical types. In this special case the numerical type is…

Algebraic Geometry · Mathematics 2011-02-03 Fabrizio Catanese , Michael Lönne , Fabio Perroni

Classical affine Lie algebras appear e.g. as symmetries of infinite dimensional integrable systems and are related to certain differential equations. They are central extensions of current algebras associated to finite-dimensional Lie…

Quantum Algebra · Mathematics 2007-05-23 Martin Schlichenmaier

We show that each connected group scheme of finite type over an arbitrary ground field is isomorphic to the component of the identity inside the automorphism group scheme of some projective, geometrically integral scheme. The main…

Algebraic Geometry · Mathematics 2024-06-26 Michel Brion , Stefan Schröer

In this paper we study injective modules over universal enveloping algebras of finite-dimensional Lie algebras over fields of arbitrary characteristic. Most of our results are dealing with fields of prime characteristic but we also…

Representation Theory · Mathematics 2007-05-23 Joerg Feldvoss

Derived equivalences for Artin algebras (and almost $\nu$-stable derived equivalences for finite-dimensional algebras) are constructed from Milnor squares of algebras. Particularly, three operations of gluing vertices, unifying arrows and…

Representation Theory · Mathematics 2017-04-18 Wei Hu , Changchang Xi