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math.OA2023
Relative Cuntz--Pimsner algebras: classification of gauge-equivariant representations: a simple and complete picture
Alexander Frei
We give a simple and complete picture on the classification of relative Cuntz--Pimsner algebras (and so also of gauge-equivariant representations) using their intuitive parametrisa…
math.OA2022
Connes implies Tsirelson: a simple proof
Alexander Frei
More precisely, we give a simple and very short proof of "the Connes embedding problem implies the synchronous Tsirelson conjecture" that relies on only two elementary ingredients:…