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We count the number of submodules of an arbitrary module over a countable noetherian commutative ring. We give, along the way, a structural description of meager modules, which are defined as those that do not have the square of a simple…

Commutative Algebra · Mathematics 2019-07-03 Yves Cornulier

We produce a cofibrantly generated simplicial symmetric monoidal model structure for the category of (small unital) C*-categories, whose weak equivalences are the unitary equivalences. The closed monoidal structure consists of the maximal…

Category Theory · Mathematics 2012-11-13 Ivo Dell'Ambrogio

We introduce a new family of monoidal categories which are cyclotomic quotients of the nil-Brauer category. We construct a monoidal functor from the cyclotomic nil-Brauer category to another monoidal category constructed from singular…

Representation Theory · Mathematics 2025-11-25 Elijah Bodish , Jonathan Brundan , Ben Elias

We investigate symmetries of the scalar field theory with harmonic term on the Moyal space with euclidean scalar product and general symplectic form. The classical action is invariant under the orthogonal group if this group acts also on…

Mathematical Physics · Physics 2011-01-17 Axel de Goursac , Jean-Christophe Wallet

We characterize injective objects, injective hulls and essential embeddings in the category of symmetric categories enriched in a small, integral and involutive quantaloid. In particular, injective partial metric spaces are precisely…

Category Theory · Mathematics 2023-12-13 Lili Shen , Hang Yang

We show that if a graded submodule of a Noetherian module cannot be written as a proper intersection of graded submodules, then it cannot be written as a proper intersection of submodules at all. More generally, we show that a natural…

Commutative Algebra · Mathematics 2016-10-03 Justin Chen , Youngsu Kim

Cohen proved that the infinite variable polynomial ring $R=k[x_1,x_2,\ldots]$ is noetherian with respect to the action of the infinite symmetric group $\mathfrak{S}$. The first two authors began a program to understand the…

Commutative Algebra · Mathematics 2025-08-07 Rohit Nagpal , Andrew Snowden , Teresa Yu

We define the notion of an enriched Reedy category, and show that if A is a C-Reedy category for some symmetric monoidal model category C and M is a C-model category, the category of C-functors and C-natural transformations from A to M is…

Algebraic Topology · Mathematics 2015-01-15 Vigleik Angeltveit

In \cite{tva}, Bertrand Toen and Michel Vaquie defined a scheme theory for a closed monoidal category $(C,\otimes,1)$. In this article, we define a notion of smoothness in this relative (and not necesarilly additive) context which…

Algebraic Geometry · Mathematics 2009-09-20 Florian Marty

The structure of cyclically pure injective modules over a commutative ring $R$ is investigated and several characterizations for them are presented. In particular, we prove that a module $D$ is cyclically pure injective if and only if $D$…

Commutative Algebra · Mathematics 2007-05-23 Kamran Divaani-Aazar , Mohammad Ali Esmkhani , Massoud Tousi

To a big n-tilting object in a complete, cocomplete abelian category A with an injective cogenerator we assign a big n-cotilting object in a complete, cocomplete abelian category B with a projective generator, and vice versa. Then we…

Category Theory · Mathematics 2021-01-13 Leonid Positselski , Jan Stovicek

We define the exact category of contraherent cosheaves of contramodules on a locally Noetherian formal scheme, as well as the exact categories of locally contraherent cosheaves of contramodules (with respect to a given open covering). We…

Algebraic Geometry · Mathematics 2026-05-05 Leonid Positselski

Let $(H, \a)$ be a monoidal Hom-Hopf algebra and $(A, \b)$ a right $(H, \a)$-Hom-comodule algebra. We first investigate the criterion for the existence of a total integral of $(A, \b)$ in the setting of monoidal Hom-Hopf algebras. Also we…

Rings and Algebras · Mathematics 2015-06-23 Shuangjian Guo , Xiaohui Zhang , Shengxiang Wang

In this paper we give a complete classification of spherically symmetric static space-times by their Noether symmetries. The determining equations for Noether symmetries are obtained by using the usual Lagrangian of a general spherically…

Mathematical Physics · Physics 2016-01-05 Farhad Ali , Tooba Feroze , Sajid Ali

In here we define the concept of fibered symmetric bimonoidal categories. These are roughly speaking fibered categories D->C whose fibers are symmetric monoidal categories parametrized by C and such that both D and C have a further…

Algebraic Topology · Mathematics 2009-05-20 Jose Manuel Gomez

Let $\V$ be a symmetric monoidal model category and let $X$ be an object in $\V$. From this we can construct a new symmetric monoidal model category $Sp^{\Sigma}(\V,X)$ of symmetric spectra objects in $\V$ with respect to $X$, together with…

Algebraic Geometry · Mathematics 2013-06-18 Marco Robalo

The monoidal category of Soergel bimodules can be thought of as a categorification of the Hecke algebra of a finite Weyl group. We present this category, when the Weyl group is the symmetric group, in the language of planar diagrams with…

Representation Theory · Mathematics 2016-03-08 Ben Elias , Mikhail Khovanov

The recently-developed techniques of Noether analysis of the quantum-group spacetime symmetries of some noncommutative field theories rely on the {\it ad hoc} introduction of some peculiar auxiliary transformation parameters, which appear…

High Energy Physics - Theory · Physics 2010-09-17 Giovanni Amelino-Camelia , Giulia Gubitosi , Flavio Mercati , Giacomo Rosati

We show that for a monoidal model category $\M=(\ul{M}, \otimes, I)$, certain co-Segal $\M$-categories are equivalent to strict ones.

Category Theory · Mathematics 2013-08-02 Hugo V. Bacard

In constructive mathematics, several nonequivalent notions of finiteness exist. In this paper, we continue the study of Noetherian sets in the dependently typed setting of the Agda programming language. We want to say that a set is…

Logic in Computer Science · Computer Science 2016-04-06 Denis Firsov , Tarmo Uustalu , Niccolò Veltri