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  2. Turing machine - Wikipedia

    en.wikipedia.org/wiki/Turing_machine

    A Turing machine is a mathematical model of computation describing an abstract machine [ 1 ] that manipulates symbols on a strip of tape according to a table of rules. [ 2 ] Despite the model's simplicity, it is capable of implementing any computer algorithm. [ 3 ]

  3. Universal Turing machine - Wikipedia

    en.wikipedia.org/wiki/Universal_Turing_machine

    In computer science, a universal Turing machine (UTM) is a Turing machine capable of computing any computable sequence, [1] as described by Alan Turing in his seminal paper "On Computable Numbers, with an Application to the Entscheidungsproblem". Common sense might say that a universal machine is impossible, but Turing proves that it is possible.

  4. Automatic Computing Engine - Wikipedia

    en.wikipedia.org/wiki/Automatic_Computing_Engine

    The Automatic Computing Engine (ACE) was a British early electronic serial stored-program computer design by Alan Turing. Turing completed the ambitious design in late 1945, having had experience in the years prior with the secret Colossus computer at Bletchley Park. The ACE was not built, but a smaller version, the Pilot ACE, was constructed ...

  5. Nondeterministic Turing machine - Wikipedia

    en.wikipedia.org/.../Nondeterministic_Turing_machine

    e. In theoretical computer science, a nondeterministic Turing machine (NTM) is a theoretical model of computation whose governing rules specify more than one possible action when in some given situations. That is, an NTM's next state is not completely determined by its action and the current symbol it sees, unlike a deterministic Turing machine.

  6. Alan Turing - Wikipedia

    en.wikipedia.org/wiki/Alan_Turing

    Alan Mathison Turing OBE FRS (/ ˈtjʊərɪŋ /; 23 June 1912 – 7 June 1954) was an English mathematician, computer scientist, logician, cryptanalyst, philosopher and theoretical biologist. [ 5 ] He was highly influential in the development of theoretical computer science, providing a formalisation of the concepts of algorithm and computation ...

  7. Busy beaver - Wikipedia

    en.wikipedia.org/wiki/Busy_beaver

    An nth busy beaver, BB-n or simply "busy beaver" is a Turing machine that wins the n -state busy beaver game. [ 5 ] Depending on definition, it either attains the highest score, or runs for the longest time, among all other possible n -state competing Turing machines.

  8. Turing machine equivalents - Wikipedia

    en.wikipedia.org/wiki/Turing_machine_equivalents

    e. A Turing machineis a hypothetical computing device, first conceived by Alan Turingin 1936. Turing machines manipulate symbols on a potentially infinite strip of tape according to a finite table of rules, and they provide the theoretical underpinnings for the notion of a computer algorithm. While none of the following models have been shown ...

  9. Quantum Turing machine - Wikipedia

    en.wikipedia.org/wiki/Quantum_Turing_machine

    Turing machines. A quantum Turing machine (QTM) or universal quantum computer is an abstract machine used to model the effects of a quantum computer. It provides a simple model that captures all of the power of quantum computation—that is, any quantum algorithm can be expressed formally as a particular quantum Turing machine.