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The structure of monoidal categories in which every arrow is invertible is analyzed in this paper, where we develop a 3-dimensional Schreier-Grothendieck theory of non-abelian factor sets for their classification. In particular, we state…

Category Theory · Mathematics 2012-12-19 María Calvo , Antonio M. Cegarra , Benjamín A. Heredia

This work adapts the equivalent definitions of division algebras over a field into multiple types of division algebras in a monoidal category. Examples and consequences of these definitions are then established in various monoidal settings.

Quantum Algebra · Mathematics 2025-11-18 Jacob Kesten , Chelsea Walton

In this paper we study finite monoids M such that the group algebras over a domain R for all Schutzenberger groups of M are cell algebras. We show that for any such M the monoid algebra A over R has a standard cell algebra structure. Using…

Rings and Algebras · Mathematics 2015-05-26 Robert D. May

Let X be a singular affine normal variety with coordinate ring R and assume that there is an R-order admitting a stability structure such that the scheme of relevant semistable representations is smooth, then we construct a partial…

Rings and Algebras · Mathematics 2007-05-23 Lieven Le Bruyn , Stijn Symens

In this paper we introduce a new kind of topological space, called 'structured space', which locally resembles various kinds of algebraic structures. This can be useful, for instance, to locally study a space that cannot be globally endowed…

General Mathematics · Mathematics 2020-03-27 Manuel Norman

We construct affine algebras with an arbitrary amount of simple modules of each dimension.

Rings and Algebras · Mathematics 2015-12-17 Be'eri Greenfeld

We present several naturally occurring classes of spectral spaces using commutative algebra on pointed monoids. For this purpose, our main tools are finite type closure operations and continuous valuations on monoids which we introduce in…

Rings and Algebras · Mathematics 2018-11-06 Samarpita Ray

We compute the quiver of any monoid that has a basic algebra over an algebraically closed field of characteristic zero. More generally, we reduce the computation of the quiver over a splitting field of a class of monoids that we term…

Representation Theory · Mathematics 2019-02-20 Stuart W. Margolis , Benjamin Steinberg

Fix a prime number $p$. We report on some recent developments in algebraic geometry (broadly construed) over $p$-adically complete commutative rings. These developments include foundational advances within the subject as well as external…

Algebraic Geometry · Mathematics 2021-12-23 Bhargav Bhatt

For any finite dimensional basic associative algebra, we study the presentation spaces and their relation with the representation spaces. We prove two propositions about a general presentation, one on its subrepresentations and the other on…

Rings and Algebras · Mathematics 2015-04-10 Harm Derksen , Jiarui Fei

This paper introduces and studies a categorical analogue of the familiar monoid semiring construction. By introducing an axiomatisation of summation that unifies notions of summation from algebraic program semantics with various notions of…

Category Theory · Mathematics 2013-06-03 Peter Hines

We make an attempt to develop "noncommutative algebraic geometry" in which noncommutative affine schemes are in one-to-one correspondence with associative algebras. In the first part we discuss various aspects of smoothness in affine…

Algebraic Geometry · Mathematics 2016-09-07 Maxim Kontsevich , Alexander Rosenberg

In this paper we propose a way to construct an analytic space over a non-archimedean field, starting with a real manifold with an affine structure which has integral monodromy. Our construction is motivated by the junction of Homological…

Algebraic Geometry · Mathematics 2007-05-23 Maxim Kontsevich , Yan Soibelman

This paper is devoted to the classification and studying properties of complex unital $3$-dimensional structurable algebras. We provide a complete list of non-isomorphic classes, identifying five algebras for type $(2, 1)$ and two algebras…

Rings and Algebras · Mathematics 2026-03-05 Kobiljon Abdurasulov , Maqpal Eraliyeva , Ivan Kaygorodov

If $X$ is a variety with an additional structure $\xi$, such as a marked point, a divisor, a polarization, a group structure and so forth, then it is possible to study whether the pair $(X,\xi)$ is defined over the field of moduli. There…

Algebraic Geometry · Mathematics 2023-11-29 Giulio Bresciani

Pursuing a generalization of group symmetries of modular categories to category symmetries in topological phases of matter, we study linear Hopf monads. The main goal is a generalization of extension and gauging group symmetries to category…

Quantum Algebra · Mathematics 2019-11-05 Shawn X. Cui , Modjtaba Shokrian Zini , Zhenghan Wang

We study holomorphic foliations with an affine homogeneous transverse structure. We give a friendly characterization of the case of transversely affine foliations in terms of matrix valued pairs of differential forms. This leads naturally…

Geometric Topology · Mathematics 2014-11-04 Bruno Scardua

We observe algebraic derivations on an affine domain B defined over an algebraically closed field of characteristic 0, which are called locally finite derivations in commutative and non-commutative contexts in other references. We observe…

Algebraic Geometry · Mathematics 2013-03-07 Kayo Masuda , Masayoshi Miyanishi

This is an expository article on the theory of algebraic stacks. After introducing the general theory, we concentrate in the example of the moduli stack of vector budles, giving a detailed comparison with the moduli scheme obtained via…

Algebraic Geometry · Mathematics 2007-05-23 T. Gomez

We introduce a canonical structure of a commutative associative filtered algebra with the unit on polynomial smooth valuations, and study its properties. The induced structure on the subalgebra of translation invariant smooth valuations has…

Metric Geometry · Mathematics 2021-04-23 Semyon Alesker