R. Exel

activity

19982026

most citedNoncommutative Cartan sub-algebras of C*-algebras

23 citations · 82 across the 23 of their papers we have counts for

collaborators

Showing 2019Show all

3 papers · 1 filter

math.OA2019

Intermediate C*-algebras of Cartan Embeddings

Jonathan H. Brown, Ruy Exel, Adam H. Fuller +2

Let $A$ be a C $^{*}$ -algebra and let $D$ be a Cartan subalgebra of $A$ . We study the following question: if $B$ is a C $^{*}$ -algebra such that $D \subseteq B \subseteq A$ , is $D$ a Car…

math.OA2019

Subshift semigroups

R. Exel, B. Steinberg

Given a one-sided subshift $X$ on a finite alphabet, we consider the semigroup $S_{X} = L_{X} \cup {0}$ , where $L_{X}$ is the language of $X$ , equipped with the multiplication operati…

math.OA2019

Tight and cover-to-join representations of semilattices and inverse semigroups

Ruy Exel

We discuss the relationship between tight and cover-to-join representations of semilattices and inverse semigroups, showing that a slight extension of the former, together with an…