M. Ephrem

activity

20022020

most citedCharacterizing Liminal And Type I Graph C*-Algebras

5 citations · 7 across the 4 of their papers we have counts for

collaborators

5 papers

math.OA2020

On Labeled Graph $C^{*}$ -algebras

Debendra P Banjade, Menassie Ephrem

Given a directed graph $E$ and a labeling $L$ , one forms the labeled graph $C^{*}$ -algebra by taking a weakly left--resolving labeled space $(E, L, B)$ …

math.OA2019★ 1 cited

Primitive Ideals of Labelled Graph $C^{*}$ -algebras

Menassie Ephrem

Given a directed graph $E$ and a labeling $L$ , one forms the labelled graph $C^{*}$ -algebra by taking a weakly left--resolving labelled space $(E, \mathcal{L}, \mathcal{B})…

math.OA2011★ 1 cited

$C^{*}$ -algebra of the $\mathds{Z}^n$-tree

Menassie Ephrem

Let $Λ = Z^{n}$ with lexicographic ordering. $Λ$ is a totally ordered group. Let $X = Λ^{+} * Λ^{+}$ . Then $X$ is a $Λ$ -tree. Analogous to the construction of graph $C^{*}$ -algebra…

math.OA2009

$K$ -theory of $C^{*}$ -algebras of directed graphs

Menassie Ephrem, Jack Spielberg

For a directed graph $E$ , we compute the $K$ -theory of the $C^{*}$ -algebra $C^{*} (E)$ from the Cuntz-Krieger generators and relations. First we compute the $K$ -theory of the crossed pr…

math.OA2002★ 5 cited

Characterizing Liminal And Type I Graph C*-Algebras

Menassie Ephrem

We prove that the C*-algebra of a directed graph $E$ is liminal iff the graph satisfies the finiteness condition: if $p$ is an infinite path or a path ending with a sink or an infi…

On Labeled Graph C∗-algebras

Primitive Ideals of Labelled Graph C∗-algebras

C∗-algebra of the $\mathds{Z}^n$-tree

K-theory of C∗-algebras of directed graphs

Characterizing Liminal And Type I Graph C*-Algebras

On Labeled Graph $C^{*}$ -algebras

Primitive Ideals of Labelled Graph $C^{*}$ -algebras

$C^{*}$ -algebra of the $\mathds{Z}^n$-tree

$K$ -theory of $C^{*}$ -algebras of directed graphs