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The aim of this work is to study the structure of bounded finite potent endomorphisms on Hilbert spaces. In particular, for these operators, an answer to the Invariant Subspace Problem is given and the main properties of its adjoint…

Functional Analysis · Mathematics 2021-03-09 Fernando Pablos Romo

It has been conjectured that finite tensor categories have finitely generated cohomology. We show that this is equivalent to finitely generated Hochschild cohomology for the endomorphism algebras of the projective generators.

Quantum Algebra · Mathematics 2026-04-23 Petter Andreas Bergh

The Torelli group $\mathcal T(X)$ of a closed smooth manifold $X$ is the subgroup of the mapping class group $\pi_0(\mathrm{Diff}^+(X))$ consisting of elements which act trivially on the integral cohomology of $X$. In this note we give…

Geometric Topology · Mathematics 2019-07-15 Matthias Kreck , Yang Su

Let T be a triangulated category, A a graded abelian category and h: T -> A a homology theory on T with values in A. If the functor h reflects isomorphisms, is full and is such that for any object x in A there is an object X in T with an…

Category Theory · Mathematics 2010-11-01 Teimuraz Pirashvili , Maria Julia Redondo

We show that the embeddability relations for countable quandles and for countable fields of any given characteristic other than 2 are maximally complex in a strong sense: they are invariantly universal. This notion from the theory of Borel…

Logic · Mathematics 2020-07-21 Andrew D. Brooke-Taylor , Filippo Calderoni , Sheila K. Miller

In this paper we pursue the study of spectral categories initiated in [26]. More precisely, we construct the Universal matrix invariant of spectral categories, i.e. a functor U with values in an additive category Add, which inverts the…

Algebraic Topology · Mathematics 2009-04-15 Goncalo Tabuada

The main goal of this paper is to give a complete proof of the trace theorem for Besov-type spaces of generalized smoothness associated with complete Bernstein functions satisfying certain scaling conditions on $d$-sets $D\subset\mathbb…

Functional Analysis · Mathematics 2018-03-28 Vanja Wagner

We give sufficient conditions which ensure that a functor of finite length from an additive category to finite-dimensional vector spaces has a projective resolution whose terms are finitely generated. For polynomial functors, we study also…

K-Theory and Homology · Mathematics 2023-07-14 Aurélien Djament , Antoine Touzé

The Schur-Weyl duality, which started as the study of the commuting actions of the symmetric group $S_d$ and $\mathrm{GL}(n,\mathbb{C})$ on $V^{\otimes d}$ where $V=\mathbb{C}^n$, was extended by Drinfeld and Jimbo to the context of the…

Representation Theory · Mathematics 2019-01-01 Yuval Z. Flicker

Let $V$ be the two-dimensional simple module and $M$ be a projective Verma module for the quantum group of $\mathfrak{sl}_2$ at generic $q$. We show that for any $r\ge 1$, the endomorphism algebra of $M\otimes V^{\otimes r}$ is isomorphic…

Representation Theory · Mathematics 2019-01-09 Kenji Iohara , Gus Lehrer , Ruibin Zhang

We study the motivic Serre invariant of a smoothly bounded algebraic or rigid variety $X$ over a complete discretely valued field $K$ with perfect residue field $k$. If $K$ has characteristic zero, we extend the definition to arbitrary…

Algebraic Geometry · Mathematics 2008-09-26 Johannes Nicaise

In this article we study the K-theory of endomorphisms using noncommutative motives. We start by extending the K-theory of endomorphisms functor from ordinary rings to (stable) infinity categories. We then prove that this extended functor…

Algebraic Topology · Mathematics 2013-02-07 Andrew J. Blumberg , David Gepner , Goncalo Tabuada

The aim of this work is to offer a family of invariants that allows us to classify finite potent endomorphisms on arbitrary vector spaces, generalizing the classification of endomorphisms on finite-dimensional vector spaces. As a particular…

Rings and Algebras · Mathematics 2020-07-07 Fernando Pablos Romo

Let $V$ be a vector space with countable dimension over a field, and let $u$ be an endomorphism of it which is locally finite, i.e. $(u^k(x))_{k \geq 0}$ is linearly dependent for all $x$ in $V$. We give several necessary and sufficient…

Rings and Algebras · Mathematics 2021-07-12 Clément de Seguins Pazzis

In this paper we formulate and lay the foundations for the K-theoretic Farrell-Jones Conjecture for the Hecke algebra of totally disconnected groups. The main result of his paper is the proof that it passes to closed subgroups. Moreover, we…

K-Theory and Homology · Mathematics 2023-06-08 Arthur Bartels , Wolfgang Lueck

Suppose $X$ is a smooth projective scheme of finite type over a field $K$, $\mathcal{E}$ is a locally free ${\mathcal{O}}_{X}$-bimodule of rank 2, $\mathcal{A}$ is the non-commutative symmetric algebra generated by $\mathcal{E}$ and ${\sf…

Rings and Algebras · Mathematics 2009-02-27 A. Nyman

We develop a new duality between endomorphisms of measure spaces, on the one hand, and a certain family of positive operators, called transfer operators, acting in spaces of measurable functions on, on the other. A framework of standard…

Functional Analysis · Mathematics 2017-02-10 Sergey Bezuglyi , Palle E. T. Jorgensen

We use category theory to propose a unified approach to the Schur-Weyl dualities involving the general linear Lie algebras, their polynomial extensions and associated quantum deformations. We define multiplicative sequences of algebras…

Representation Theory · Mathematics 2011-05-13 Alexei Davydov , Alexander Molev

We generalize a recent result by J.F. Carlson to finite tensor categories having finitely generated cohomology. Specifically, we show that if the Krull dimension of the cohomology ring is sufficiently large, then there exist infinitely many…

K-Theory and Homology · Mathematics 2023-01-19 Petter Andreas Bergh

As a natural generalization quantum Schur algebras associated with the Hecke algebra of the symmetric group, we introduce the quantum Schur superalgebra of type Q associated with the Hecke-Clifford superalgebra, which, by definition, is the…

Representation Theory · Mathematics 2018-02-26 Jie Du , Jinkui Wan