BIRS Workshop Lecture Videos

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BIRS Workshop Lecture Videos

More on approximate Ramsey properties Lopez Abad, Jordi


Using the metric version of the KPT correspondence, we prove that the automorphisms groups of several limits of finite dimensional operator spaces and systems are extremely amenable, including the Gurarij space and its non-commutative version $\mathbb{NG}$. Dually, we prove that the universal minimal flow of the Poulsen simplex $\mathbb P$ is $\mathbb P$ itself, and again similarly for its non-commutative version $\mathbb{NP}$. The approximate Ramsey properties (ARP) we find are consequence of the dual Ramsey Theorem (DRT) by Graham and Rothschild. In a similar way, we will see present an approximate Ramsey property for quasi-equipartitions and how to use it to deduce the ARP of the family $\{\ell_p^n\}_n$, $1\le p\neq 2

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