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We give some new characterizations of unitaries, isometries, unital operator spaces, unital function spaces, operator systems, C*-algebras, and related objects. These characterizations only employ the vector space and operator space…

Operator Algebras · Mathematics 2008-05-23 David P. Blecher , Matthew Neal

For the double complex structure of grading-restricted vertex algebra cohomology defined in \cite{Huang}, we introduce a multiplication of elements of double complex spaces. We show that the orthogonality and bi-grading conditions applied…

Functional Analysis · Mathematics 2021-07-07 A. Zuevsky

In this thesis we study three problems. The first is the superposition of the operators and their proprities, such as boundedness,continuity,regularity and the inequalities of the norms of the composition of functions in some functional…

Functional Analysis · Mathematics 2026-01-14 Mahdi Tahar Brahimi

This paper is a survey of our recent work on operator algebras associated to dynamical systems that lead to classification results for the systems in terms of algebraic invariants of the operator algebras.

Operator Algebras · Mathematics 2009-04-21 K. R. Davidson , E. G. Katsoulis

Recently, we obtained in [7] a new characterization for an orthogonal system to be a simple-minded system in the stable module category of any representation-finite self-injective algebra. In this paper, we apply this result to give an…

Representation Theory · Mathematics 2020-06-26 Jing Guo , Yuming Liu , Yu Ye , Zhen Zhang

In vertex operator algebra theories, most of the general theorems are proved under the assumptions of rationality and C_2-cofiniteness. In this paper, we obtain several general theorems without the assumption of rationality so that we can…

Quantum Algebra · Mathematics 2011-04-26 Masahiko Miyamoto

Some concepts, such as non-compactness measure and condensing operators, defined on metric spaces are extended to uniform spaces. Such extensions allow us to locate, in the context of uniform spaces, some classical results existing in…

General Topology · Mathematics 2015-11-25 Raúl Fierro

In this paper, continuous binary operations of a topological space are studied and a criterion of their invertibility is proved. The classification problem of groups of invertible continuous binary operations of locally compact and locally…

General Topology · Mathematics 2023-08-01 Pavel S. Gevorgyan

We discuss many-body states and the algebra of creation and annihilation operators for particles obeying exclusion statistics.

Condensed Matter · Physics 2009-10-22 Dimitra Karabali , V. P. Nair

Let E be a locally solid vector lattice. In this paper, we consider two particular vector subspaces of the space of all order bounded operators on E. With the aid of two appropriate topologies, we show that under some conditions, they…

Functional Analysis · Mathematics 2016-11-07 Omid Zabeti

We establish the dual equivalence of the category of (potentially nonunital) operator systems and the category of pointed compact nc (noncommutative) convex sets, extending a result of Davidson and the first author. We then apply this dual…

Operator Algebras · Mathematics 2021-03-24 Matthew Kennedy , Se-Jin Kim , Nicholas Manor

We show that the category OS of operator spaces, with complete contractions as morphisms, is locally countably presentable. This result, together with its symmetric monoidal closed structure with respect to the projective tensor product of…

Category Theory · Mathematics 2024-12-31 Bert Lindenhovius , Vladimir Zamdzhiev

Off-diagonal geometric phases have been developed in order to provide information of the geometry of paths that connect noninterfering quantal states. We propose a kinematic approach to off-diagonal geometric phases for pure and mixed…

Quantum Physics · Physics 2016-08-16 D. M. Tong , Erik Sjöqvist , Stefan Filipp , L. C. Kwek , C. H. Oh

In this paper we discuss some physical applications of topological *-algebras of unbounded operators. Our first example is a simple system of free bosons. Then we analyze different models which are related to this one. We also discuss the…

Operator Algebras · Mathematics 2009-10-31 F. Bagarello

For some time now, conformal field theories in two dimensions have been studied as integrable systems. Much of the success of these studies is related to the existence of an operator algebra of the theory. In this paper, some of the…

High Energy Physics - Theory · Physics 2009-11-11 Jasbir Nagi

On the one hand the algebras of linear operators here act on finite-dimensional vector spaces, and on the other hand the point of view is generally an analysts'. Also, one might think of algebras as being used to add more data to basic…

Classical Analysis and ODEs · Mathematics 2007-05-23 Stephen Semmes

We discuss some basic problems and conjectures in a program to construct general orbifold conformal field theories using the representation theory of vertex operator algebras. We first review a program to construct conformal field theories.…

Quantum Algebra · Mathematics 2020-04-03 Yi-Zhi Huang

The nonlinear geometry of operator spaces has recently started to be investigated. Many notions of nonlinear embeddability have been introduced so far, but, as noticed before by other authors, it was not clear whether they could be…

Functional Analysis · Mathematics 2022-11-23 Bruno de Mendonça Braga , Timur Oikhberg

We introduce and obtain multimode paraboson coherent states. In appropriate subspaces these coherent states provide a decomposition of unity where the measure, when expressed using the cat-type states, is positive definite. Bicoherent…

Mathematical Physics · Physics 2009-02-02 R. Chakrabarti , N. I. Stoilova , J. Van der Jeugt

We construct some inverse-closed algebras of bounded integral operators with operator-valued kernels, acting in spaces of vector-valued functions on locally compact groups. To this end we make systematic use of covariance algebras…

Functional Analysis · Mathematics 2014-08-21 Ingrid Beltita , Daniel Beltita
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