In von Neumann algebras, the Connes embedding problem or conjecture, due to Alain Connes, asks whether every free ultrafilter.
Alain Connes | Year 2000 problem | Waring's problem | The Final Problem | The Problem with Popplers | Hume and the Problem of Causation | Dirichlet problem | Boolean satisfiability problem | The Dog Problem | Tammes problem | Species problem | problem solving | Problem gambling | Packing problem | packing problem | Nash embedding theorem | chess problem | Znám's problem | Year 10,000 problem | Yamabe problem | Weber problem | Undecidable problem | Tutte embedding | Travelling salesman problem | travelling salesman problem | The Problem of Thor Bridge | The Problem of the Media: U.S. Communication Politics in the 21st Century | The Problem of Social Cost | Tarski's circle squaring problem | Steiner tree problem |