@InProceedings{burgdorf_et_al:LIPIcs.TQC.2015.127,
author = {Burgdorf, Sabine and Laurent, Monique and Piovesan, Teresa},
title = {{On the Closure of the Completely Positive Semidefinite Cone and Linear Approximations to Quantum Colorings}},
booktitle = {10th Conference on the Theory of Quantum Computation, Communication and Cryptography (TQC 2015)},
pages = {127--146},
series = {Leibniz International Proceedings in Informatics (LIPIcs)},
ISBN = {978-3-939897-96-5},
ISSN = {1868-8969},
year = {2015},
volume = {44},
editor = {Beigi, Salman and K\"{o}nig, Robert},
publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
address = {Dagstuhl, Germany},
URL = {https://drops-dev.dagstuhl.de/entities/document/10.4230/LIPIcs.TQC.2015.127},
URN = {urn:nbn:de:0030-drops-55537},
doi = {10.4230/LIPIcs.TQC.2015.127},
annote = {Keywords: Quantum graph parameters, Trace nonnegative polynomials, Copositive cone, Chromatic number, Quantum Entanglement, Nonlocal games, Von Neumann algebra}
}