The Universal Theory Of The Hyperfinite II$_1$ Factor Is Not Computable
Abstract
We show that the universal theory of the hyperfinite II$_1$ factor is not
computable. The proof uses the recent result that MIP*=RE. Combined with an
earlier observation of the authors, this yields a proof that the Connes
Embedding Problem has a negative solution that avoids the equivalences with
Kirchberg's QWEP Conjecture and Tsirelson's Problem.+