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A synchronous game for binary constraint systems

- Se-Jin Kim, V. Paulsen, Christopher Schafhauser
- Computer Science
- 4 July 2017

TLDR

A new proof of the Tikuisis–White–Winter theorem

- Christopher Schafhauser
- MathematicsJournal für die reine und angewandte Mathematik…
- 9 January 2017

Abstract A trace on a C*{\mathrm{C}^{*}}-algebra is amenable (resp. quasidiagonal) if it admits a net of completely positive, contractive maps into matrix algebras which approximately preserve the… Expand

AF-Embeddings of Graph Algebras

- Christopher Schafhauser
- Mathematics
- 30 May 2014

Let $E$ be a countable directed graph. We show that $C^*(E)$ is AF-embeddable if and only if no loop in $E$ has an entrance. The proof is constructive and is in the same spirit as the Drinen-Tomforde… Expand

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

- Christopher Schafhauser
- Mathematics
- 2 March 2015

Crossed products of nuclear C*-algebras by free groups and their traces

- T. Rainone, Christopher Schafhauser
- Mathematics
- 22 January 2016

We study the matricial field (MF) property for certain reduced crossed product C*-algebras and their traces. Using classification techniques and induced K-theoretic dynamics, we show that reduced… Expand

Finiteness properties of certain topological graph algebras

- Christopher Schafhauser
- Mathematics
- 30 August 2014

Let E=(E0,E1,r,s) be a topological graph with no sinks such that E0 and E1 are compact. We show that when C*(E) is finite, there is a natural isomorphism C*(E)≅C(E∞)⋊Z , where E∞ is the infinite path… Expand

Decomposing nuclear maps

- Jos'e R. Carri'on, Christopher Schafhauser
- Mathematics
- 2 August 2019

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

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

- Laura Manvcinska, Jitendra Prakash, Christopher Schafhauser
- Mathematics
- 2 March 2021

We consider correlations, ?=,G , arising from measuring a maximally entangled state using = measurements with two outcomes each, constructed from = projections that add up to G . We show that the… Expand

Noncommutative boundaries and the ideal structure of reduced crossed products

- M. Kennedy, Christopher Schafhauser
- MathematicsDuke Mathematical Journal
- 5 October 2017

A C*-dynamical system is said to have the ideal separation property if every ideal in the corresponding crossed product arises from an invariant ideal in the C*-algebra. In this paper we characterize… Expand

Subalgebras of simple AF-algebras

- Christopher Schafhauser
- Mathematics
- 19 July 2018

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 embedding into a… Expand

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