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For a nice-enough category $\mathcal{C}$, we construct both the morphism category ${\rm H}(\mathcal{C})$ of $\mathcal{C}$ and the category ${\rm mod}\mbox{-}\mathcal{C}$ of all finitely presented contravariant additive functors over…

Representation Theory · Mathematics 2023-08-01 Rasool Hafezi , Hossein Eshraghi

The work is devoted to the extension groups in the category of functors from a small category to an additive category with an Abelian structure in the sense of Heller. It is constructed a spectral sequence which converges to the extension…

Category Theory · Mathematics 2009-09-28 A. A. Husainov , A. Pancar , M. Yapici

Ginzburg, Guay, Opdam and Rouquier established an equivalence of categories between a quotient category of the category $\mathcal{O}$ for the rational Cherednik algebra and the category of finite dimension modules of the Hecke algebra of a…

Representation Theory · Mathematics 2022-05-13 Henry Fallet

We present two Dialectica-like constructions for models of intensional Martin-L\"of type theory based on G\"odel's original Dialectica interpretation and the Diller-Nahm variant, bringing dependent types to categorical proof theory. We set…

Category Theory · Mathematics 2021-05-04 Sean K. Moss , Tamara von Glehn

Matlis duality for modules over commutative rings gives rise to the notion of Matlis reflexivity. It is shown that Matlis reflexive modules form a Krull-Schmidt category. For noetherian rings the absence of infinite direct sums is a…

Commutative Algebra · Mathematics 2025-06-04 Henning Krause

We develop a general theory of partial morphisms in additive exact categories which extends the model theoretic notion introduced by Ziegler in the particular case of pure-exact sequences in the category of modules over a ring. We relate…

Rings and Algebras · Mathematics 2020-03-11 Manuel Cortés-Izurdiaga , Pedro A. Guil Asensio , Berke Kalebogaz , Ashish K. Srivastava

We establish a correspondence between recollements of abelian categories up to equivalence and certain TTF-triples. For a module category we show, moreover, a correspondence with idempotent ideals, recovering a theorem of Jans. Furthermore,…

Representation Theory · Mathematics 2013-04-10 Chrysostomos Psaroudakis , Jorge Vitoria

In this note we give a characterization of the sectional category of a map between rational spaces in terms of its Koszul-Quillen model.

Algebraic Topology · Mathematics 2024-02-29 Urtzi Buijs , José Carrasquel

We use analogues of Enright's and Arkhipov's functors to determine the quiver and relations for a category of $\mathfrak{sl}_2 \ltimes L(4)$-modules which are locally finite (and with finite multiplicities) over $\mathfrak{sl}_2$. We also…

Representation Theory · Mathematics 2022-02-03 Volodymyr Mazorchuk , Rafael Mrđen

In this expository article, we will give an efficient functorial proof of the equivalence of various characterisations of purity in a finitely accessible additive category $\mathcal C$. The complications of the proofs for specific choices…

Representation Theory · Mathematics 2023-04-25 Samuel Dean

This paper presents a reformulation of the Leibniz product rule as a finite sum that expresses the fractional derivative of the product of two differentiable functions. This paper then proves the cases for when the product consists of an…

General Mathematics · Mathematics 2024-03-18 Ryan Wilis

We prove that the category of systems of sesquilinear forms over a given hermitian category is equivalent to the category of unimodular 1-hermitian forms over another hermitian category. The sesquilinear forms are not required to be…

Rings and Algebras · Mathematics 2015-04-07 Eva Bayer-Fluckiger , Uriya A. First , Daniel A. Moldovan

We review the construction of braided tensor categories and modular tensor categories from representations of vertex operator algebras, which correspond to chiral algebras in physics. The extensive and general theory underlying this…

High Energy Physics - Theory · Physics 2015-06-15 Yi-Zhi Huang , James Lepowsky

The F\'elix-Tanr\'e rational model for the polyhedral product of a fibre inclusion is considered. In particular, we investigate the rational model for the polyhedral product of a pair of Lie groups corresponding to arbitrary simplicial…

Algebraic Topology · Mathematics 2024-10-11 Katsuhiko Kuribayashi

We give simple upper bounds for rational sectional category and use them to compute invariants of the type of Farber's topological complexity of rational spaces. In particular we show that the sectional category of formal morphisms reaches…

Algebraic Topology · Mathematics 2015-03-10 J. G. Carrasquel-Vera

We introduce a diagrammatic braided monoidal category, the quantum spin Brauer category, together with a full functor to the category of finite-dimensional, type $1$ modules for $U_q(\mathfrak{so}(N))$ or $U_q(\mathfrak{o}(N))$. This…

Quantum Algebra · Mathematics 2025-04-24 Peter J. McNamara , Alistair Savage

We introduce the notion of a dilation for a partial representation (i.e. a partial module) of a Hopf algebra, which in case the partial representation origins from a partial action (i.e.a partial module algebra) coincides with the…

Representation Theory · Mathematics 2019-03-13 Marcelo Muniz S. Alves , Eliezer Batista , Joost Vercruysse

We prove that an abelian category equipped with an ample sequence of objects is equivalent to the quotient of the category of coherent modules over the corresponding algebra by the subcategory of finite-dimensional modules. In the…

Rings and Algebras · Mathematics 2007-05-23 Alexander Polishchuk

We study the transfer of (co)silting objects in derived categories of module categories via the extension functors induced by a morphism of commutative rings. It is proved that the extension functors preserve (co)silting objects of…

Commutative Algebra · Mathematics 2022-04-05 Simion Breaz , Michal Hrbek , George Ciprian Modoi

In this paper, we study extensions between two finite irreducible conformal modules over the Schr\"odinger-Virasoro conformal algebra and the extended Schr\"odinger-Virasoro conformal algebra. Also, we classify all finite nontrivial…

Rings and Algebras · Mathematics 2019-07-08 Lamei Yuan , Kaijing Ling