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We show that the group C*-algebra of any elementary amenable group is quasidiagonal. This is an offspring of recent progress in the classification theory of nuclear C*-algebras.

Operator Algebras · Mathematics 2014-09-24 Narutaka Ozawa , Mikael Rordam , Yasuhiko Sato

In this largely expository paper, we will present a list of En -operads and give complete, and in some cases new, proofs of the equivalences between these operads.

Algebraic Topology · Mathematics 2023-10-13 André Beuckelmann , Ieke Moerdijk

This is a detailed introductory survey of the cohomological dimension theory of compact metric spaces.

General Topology · Mathematics 2007-05-23 A. N. Dranishnikov

This is a short expository article on alternating knots and is to appear in the Concise Encyclopedia of Knot Theory.

Geometric Topology · Mathematics 2019-01-04 William W. Menasco

Definitions and notations with historical references are given for some numerical coefficients commonly used to quantify relations among collections of objects for the purpose of expressing approximate knowledge and probabilistic reasoning.

Artificial Intelligence · Computer Science 2013-04-11 Silvio Ursic

The notes provide a short introduction to de Branges--Rovnyak spaces. They cover some basic facts and are intended to give the reader a taste of the theory, providing sufficient motivation to make it interesting.

Functional Analysis · Mathematics 2014-11-18 Dan Timotin

Basic definitions and properties of nearly associative algebras are described. Nearly associative algebras are proved to be Lie-admissible algebras. Two-dimensional nearly associative algebras are classified, and its main classes are…

Rings and Algebras · Mathematics 2021-02-01 Mafoya Landry Dassoundo , Sergei Silvestrov

This is a brief introduction to the world of Noncommutative Algebra aimed at advanced undergraduate and beginning graduate students.

History and Overview · Mathematics 2019-02-26 Chelsea Walton

We introduce inner amenability for discrete p.m.p. groupoids and investigate its basic properties, examples, and the connection with central sequences in the full group of the groupoid or central sequences in the von Neumann algebra…

Operator Algebras · Mathematics 2020-05-27 Yoshikata Kida , Robin Tucker-Drob

The main purpose of this short article is to give a brief overview of the development of the very interesting weak measurement protocol. I add some comments relating to the reality of weak values, and also comment on the allowed values of…

Quantum Physics · Physics 2017-10-30 Pan N. Kaloyerou

We introduce and study various notions of amenability continuous (Borel) partial actions of locally compact (Borel) groups $G$ on topological (standard Borel) spaces. We also study amenability of partial representations of a locally compact…

Dynamical Systems · Mathematics 2022-11-15 Massoud Amini

These are general notes on tensor calculus which can be used as a reference for an introductory course on tensor algebra and calculus. A basic knowledge of calculus and linear algebra with some commonly used mathematical terminology is…

History and Overview · Mathematics 2016-05-25 Taha Sochi

In this paper, among other things, we state and prove the mean ergodic theorem for amenable semigroup algebras.

Dynamical Systems · Mathematics 2007-07-16 Ali Ghaffari

We exhibit two relation algebra atom structures such that they are elementarily equivalent but their term algebras are not. This answers Problem 14.19 in the book Hirsch, R. and Hodkinson, I., "Relation Algebras by Games", North-Holland,…

Logic · Mathematics 2025-02-12 H. Andréka , I. Németi

In this paper, we give another two characterizations of relative amenability on finite von Neumann algebras, one of which can be thought of as an analogue of injective operator systems. As an application, we prove a stable property of…

Operator Algebras · Mathematics 2018-07-06 Xiaoyan Zhou , Junsheng Fang

We obtain a complete classification of minimal simple unitary $W$-algebras.

Representation Theory · Mathematics 2024-08-05 Victor G. Kac , Pierluigi Möseneder Frajria , Paolo Papi

We introduce the concept of constructible ideal and we relate this concept with the notion of constructible simplicial complex. Several properties of constructible ideals are studied.

Commutative Algebra · Mathematics 2007-11-13 Anda Olteanu

We give a brief overview of the area of Banach algebras, intended for a general mathematical audience.

History and Overview · Mathematics 2012-06-12 Volker Runde

This is a survey of results in the enumeration of lattice paths.

Combinatorics · Mathematics 2017-05-11 C. Krattenthaler

A survey paper on some recent results on additive problems with prime powers.

Number Theory · Mathematics 2017-05-12 Alessandro Languasco