The r-to-1 collision problem is an important theoretical problem in complexity theory, quantum computing, and computational mathematics.
Year 2000 problem | Waring's problem | Traffic collision | The Final Problem | collision | The Problem with Popplers | The Crocodile Hunter: Collision Course | Hume and the Problem of Causation | Dirichlet problem | Collision Course | Boolean satisfiability problem | traffic collision | The Dog Problem | Tammes problem | Stellar collision | Species problem | problem solving | Problem gambling | Packing problem | packing problem | Collision Course (Bayley novel) | chess problem | Abermule train collision | Znám's problem | Year 10,000 problem | Yamabe problem | Worlds in Collision | Wenzhou train collision | Weber problem | Valley Heights train collision |