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![Derivations, dissipations, and group actions on C*-algebras [C-algebras]](https://covers.openlibrary.org/b/isbn/9783540171997-M.jpg?default=false)
"These notes are centered around the equivalence of two major open problems: one formulated by Connes (1976), about traces and ultraproducts of von Neumann algebras, the other one by Kirchberg (1993) about tensor products of C* algebras. This leads us to emphasize the notion of …