This post is a link to https://math.boisestate.edu/~scoskey/docs/bsl-elliott-etal-preprint.pdf

Review of “The isomorphism relation for separable C* algebras” by G. Elliott, I. Farah, et al, and “Completeness of the isomorphism problem for separable C* algebras” by M. Sabok. Bulletin of symbolic logic, 2015. (elliott review in journal)