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We introduce a certain differential graded bialgebra, neither commutative nor cocommutative, that governs perturbations of a differential on complexes supplied with an abstract Hodge decomposition. This leads to a conceptual treatment of…

Quantum Algebra · Mathematics 2017-10-05 Joseph Chuang , Andrey Lazarev

We obtain a lower estimate for the Hilbert series of Jacobi algebras and their completions by providing analogue of the Golog-Shafarevich-Vinberg theorem for potential case. We especially treat non-homogeneous situation. This estimate…

Rings and Algebras · Mathematics 2022-01-13 Natalia Iyudu , Stanislav Shkarin

In this article we survey recent results on rigid dualizing complexes over commutative algebras. We begin by recalling what are dualizing complexes. Next we define rigid complexes, and explain their functorial properties. Due to the…

Algebraic Geometry · Mathematics 2008-07-20 Amnon Yekutieli

This article concerns commutative algebras over a field $k$ of characteristic zero which are finite dimensional as vectorspaces, and particularly those of such algebras which are graded. Here the term graded is applied to non-negatively…

Algebraic Geometry · Mathematics 2011-08-29 Guillermo Cortiñas , Fabiana Krongold

A simplicial complex of dimension $d-1$ is said to be balanced if its graph is $d$-colorable. Juhnke-Kubitzke and Murai proved an analogue of the generalized lower bound theorem for balanced simplicial polytopes. We establish a…

Combinatorics · Mathematics 2016-08-30 Martina Juhnke-Kubitzke , Satoshi Murai , Isabella Novik , Connor Sawaske

We show that there exists a natural non-degenerate pairing of the homomorphism space between two neighbor standard modules over a quasi-hereditary algebra with the first extension space between the corresponding costandard modules and vise…

Representation Theory · Mathematics 2010-04-02 Volodymyr Mazorchuk , Serge Ovsienko

In this paper, we develop the theory of bimodules over von Neumann algebras, with an emphasis on categorical aspects. We clarify the relationship between dualizability and finite index. We also show that, for von Neumann algebras with…

Operator Algebras · Mathematics 2017-01-23 Arthur Bartels , Christopher L. Douglas , André Henriques

We define a generalization $\mathfrak{G}$ of the Grassmann algebra $G$ which is well-behaved over arbitrary commutative rings $C$, even when $2$ is not invertible. In particular, this enables us to define a notion of superalgebras that does…

Rings and Algebras · Mathematics 2020-12-15 Gal Dor , Alexei Kanel-Belov , Uzi Vishne

We study identities of finite dimensional algebras over a field of characteristic zero, graded by an arbitrary groupoid $\Gamma$. First we prove that its graded colength has a polynomially bounded growth. For any graded simple algebra $A$…

Rings and Algebras · Mathematics 2017-01-09 Dušan D. Repovš , Mikhail V. Zaicev

The article investigates systems of differential-difference equations of hyperbolic type, integrable in sense of Darboux. The concept of a complete set of independent characteristic integrals underlying Darboux integrability is discussed. A…

Exactly Solvable and Integrable Systems · Physics 2021-12-06 I. T. Habibullin , M. N. Kuznetsova

We give some formality criteria for a differential graded Lie algebra to be formal. For instance, we show that a DG-Lie algebra L is formal if and only if the natural spectral sequence computing the Chevalley-Eilenberg cohomology H(L,L)…

Quantum Algebra · Mathematics 2015-12-18 Marco Manetti

In this short note we study the cohomology algebra of saturated fusion systems using finite groups which realize saturated fusion systems and Hochschild cohomology of group algebras. A similar result to a theorem of Alperin is proved for…

Group Theory · Mathematics 2016-10-05 Constantin-Cosmin Todea

We develop a method to study sufficient conditions for perfect mixed tilings. Our framework allows the embedding of bounded degree graphs $H$ with components of sublinear order. As a corollary, we recover and extend the work of K\"uhn and…

Combinatorics · Mathematics 2024-10-24 Eoin Hurley , Felix Joos , Richard Lang

We prove that every proper connective DG-algebra $A$ admits a geometric realization (as defined by Orlov) by a smooth projective scheme with a full exceptional collection. As a corollary we obtain that $A$ is quasi-isomorphic to a finite…

K-Theory and Homology · Mathematics 2024-11-12 Theo Raedschelders , Greg Stevenson

We prove a generalised version of finiteness of skein modules for 3-manifolds by including boundary. We show that internal skein modules are holonomic modules over the internal skein algebra of the boundary - a property including finite…

Quantum Algebra · Mathematics 2025-09-29 David Jordan , Iordanis Romaidis

Let $A$ be an Artin algebra, $M$ be a Gorenstein projective $A$-module and $B =$ End$_A M$, then $M$ is a $A$-$B$-bimodule. We use the restricted flat dimension of $M_B$ to give a characterization of the homological dimensions of $A$ and…

Representation Theory · Mathematics 2018-02-05 Aiping Zhang

This paper is mainly devoted to a structure study of Hom-alternative algebras . Equivalent conditions for Hom-alternative algebras being solvable, simple and semi-simple are displayed. Moreover some results about Hom-alternative bimodule…

Rings and Algebras · Mathematics 2019-08-26 Sylvain Attan

The so called theory of derived D-modules is an extension of classical D-modules to derived algebraic geometry, which uses the derived information of the base scheme. We prove that the three different definitions of derived D-modules, given…

Algebraic Geometry · Mathematics 2025-10-20 Carlo Buccisano

Let $\Lambda$ be a finite-dimensional associative algebra over a field. A semibrick pair is a finite set of $\Lambda$-modules for which certain Hom- and Ext-sets vanish. A semibrick pair is completable if it can be enlarged so that a…

Representation Theory · Mathematics 2023-05-25 Emily Barnard , Eric J. Hanson

In Commutative Algebra structure results on minimal free resolutions of Gorenstein modules are of classical interest. We define Gorenstein modules of finite length over the weighted polynomial ring via symmetric matrices in divided powers.…

Commutative Algebra · Mathematics 2008-07-21 Michael Kunte