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We study closedness of the range, adjointability and generalized invertibility of modular operators between Hilbert modules over locally C*-algebras of coefficients. Our investigations and the recent results of M. Frank [Characterizing…

Operator Algebras · Mathematics 2011-08-31 Kamran Sharifi

We interpret the construction of relative Cuntz-Pimsner algebras of correspondences in terms of the correspondence bicategory, as a reflector into a certain sub-bicategory. This generalises a previous characterisation of absolute…

Operator Algebras · Mathematics 2019-09-04 Ralf Meyer , Camila F. Sehnem

We classify (possibly non commutative) algebras of low rank over a domain R. We first review results for algebras of rank 2 and for finite-dimensional division algebras over the real numbers. These results motivate us to consider which…

Rings and Algebras · Mathematics 2013-12-24 Alex S. E. Levin

We extend the classification of finite Weyl groupoids of rank two. Then we generalize these Weyl groupoids to `reflection groupoids' by admitting non-integral entries of the Cartan matrices. This leads to the unexpected observation that the…

Group Theory · Mathematics 2009-11-17 M. Cuntz , I. Heckenberger

In this article, we propose a $p$-adic analogue of complex Hilbert space and consider generalizations of some well-known theorems from functional analysis and the basic study of operators on Hilbert spaces. We compute the $K$-theory of the…

Operator Algebras · Mathematics 2019-07-17 Anton Claußnitzer , Andreas Thom

A description of group automorphisms of all two-dimensional algebras, considered up to isomorphism, over any basic field is provided.

Rings and Algebras · Mathematics 2024-11-19 Sh. Eshmirzayev , U. Bekbaev

A universality of deformed Heisenberg algebra involving the reflection operator is revealed. It is shown that in addition to the well-known infinite-dimensional representations related to parabosons, the algebra has also finite-dimensional…

High Energy Physics - Theory · Physics 2009-10-30 Mikhail Plyushchay

A brief introduction to universal algebra and the theory of topological algebras, their varieties, and free topological algebras is presented. Free topological Mal'tsev algebras are studied. Their properties, relationship with topological…

General Mathematics · Mathematics 2024-12-17 Ol'ga V. Sipacheva , Aleksandr A. Solonkov

We present a generalization of the notion of an algebra norm relevant to real finite-dimensional unital associative algebras. Among other things, this leads to a novel set of algebra isomorphism invariants, some of which are computationally…

Rings and Algebras · Mathematics 2023-12-12 Fred Greensite

Semistable reduction theorem for projective morphisms in the category of complex analytic spaces is established.

Algebraic Geometry · Mathematics 2024-10-15 Makoto Enokizono , Kenta Hashizume

We study locally finite varieties (=primitive classes) of linear algebras over finite fields. We do not assume that our algebras are associative or Lie. We are interested in the basic properties of finite algebras in these varieties such…

Rings and Algebras · Mathematics 2026-03-11 Yuri Bahturin , Alexander Olshanskii

Consider a finite dimensional (generally reducible) polynomial representation \rho of GL_n. A projective compactification of GL_n is the closure of \rho(GL_n) in the space of all operators defined up to a factor (this class of spaces can be…

Representation Theory · Mathematics 2013-01-15 Yurii A. Neretin

The Gorenstein property in local algebra admits several characterizations via its module category. The goal of this paper is to collect and generalize such characterizations to the relative setting, i.e., to Gorenstein morphisms as defined…

Commutative Algebra · Mathematics 2025-02-25 Andrew Soto Levins , Prashanth Sridhar

We give an intrinsic criterion to tell whether a reflection factorization in the general linear group is reduced, and give a formula for computing reflection length in the general affine group.

Group Theory · Mathematics 2024-02-07 Elise G. delMas , Joel Brewster Lewis

We study realizations of Lie algebras by vector fields. A correspondence between classification of transitive local realizations and classification of subalgebras is generalized to the case of regular local realizations. A reasonable…

Mathematical Physics · Physics 2017-03-03 Daniel Gromada , Severin Pošta

In an earlier work, we defined a ``generalised Temperley-Lieb algebra'' $TL_{r,1,n}$ corresponding to the imprimitive reflection group $G(r,1,n)$ as a quotient of the cyclotomic Hecke algebra. In this work we introduce the generalised…

Representation Theory · Mathematics 2024-12-30 Gus Lehrer , Mengfan Lyu

We obtain a characterization of property (T) for von Neumann algebras in terms of 1-cohomology similar to the Delorme-Guichardet Theorem for groups.

Operator Algebras · Mathematics 2007-05-23 Jesse Peterson

We define natural topologies on the Colombeau algebras which are compatible with the algebraic structure. These topologies reduces do Scarpalezos sharp topologies when restricted. with this we take a positive step towards topological…

Functional Analysis · Mathematics 2008-06-27 J. Aragona , R. Fernandez , S. O. Juriaans

In this work large families of naturally graded nilpotent Lie algebras in arbitrary dimension and characteristic sequence (n,q,1), with n odd, satisfying the centralizer property, are given. This condtion constitutes a generalization, for a…

Rings and Algebras · Mathematics 2007-05-23 Jose Maria Ancochea , Otto Rutwig Campoamor

We introduce the algebraic entropy for continuous endomorphisms of locally linearly compact vector spaces over a discrete field, as the natural extension of the algebraic entropy for endomorphisms of discrete vector spaces. We show that the…

Dynamical Systems · Mathematics 2021-01-05 Ilaria Castellano , Anna Giordano Bruno