Christopher Schafhauser

activity

20152021

most citedConstant-sized robust self-tests for states and measurements of unbounded dimension

6 citations · 7 across the 2 of their papers we have counts for

collaborators

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5 papers · 1 filter

math.OA2019

Decomposing nuclear maps

José R. Carrión, Christopher Schafhauser

We show that the strengthened version of the completely positive approximation property of Brown, Carrión, and White---where the downward maps are asymptotically order zero and the…

math.OA2018

Subalgebras of simple AF-algebras

Christopher Schafhauser

It is shown that if A is a separable, exact C*-algebra which satisfies the Universal Coefficient Theorem (UCT) and has a faithful, amenable trace, then A admits a trace-preserving…

math.OA2017★ 1 cited

MF traces and the Cuntz semigroup

Christopher Schafhauser

A trace $τ$ on a separable C*-algebra $A$ is called matricial field (MF) if there is a trace-preserving morphism from $A$ to $Q_{ω}$ , where $Q_{ω}$ denotes the norm ultrapower of the u…

math.OA2016

Traces on Topological Graph Algebras

Christopher Schafhauser

Given a topological graph $E$ , we give a complete description of tracial states on the C*-algebra $C^{*} (E)$ which are invariant under the gauge action; there is an affine h…

math.OA2015

Cuntz-Pimsner Algebras, Crossed Products, and $K$ -Theory

Christopher Schafhauser

Suppose $A$ is a $C^{*}$ -algebra and $H$ is a $C^{*}$ -correspondence over $A$ . If $H$ is regular in the sense that the left action of $A$ is faithful and is given by compact operators,…

Decomposing nuclear maps

Subalgebras of simple AF-algebras

MF traces and the Cuntz semigroup

Traces on Topological Graph Algebras

Cuntz-Pimsner Algebras, Crossed Products, and K-Theory

Cuntz-Pimsner Algebras, Crossed Products, and $K$ -Theory