Turing machine - Wikipedia
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] The machine operates on an infinite[4] memory tape divided into discrete cells,[5] each of which can hold a single symbol drawn from a finite set of symbols called the alphabet of the machine. It has a "head" that, at any point in the machine's operation, is positioned over one of these cells, and a "state" selected from a finite set of states. At each step of its operation, the head reads the symbol in its cell. Then, based on the symbol and the machine's own present state, the machine writes a symbol into the same cell, and moves the head one step to the left or the right,[6] or halts the computation. The choice of which replacement symbol to write, which direction to move the head, and whether to halt is based on a finite table th
Turing machine - Wikipedia Jump to content From Wikipedia, the free encyclopedia Computation model defining an abstract machine For other uses, see Turing machine (disambiguation) . A physical Turing machine model constructed by Mike Davey. A true Turing machine would need to be provided more memory (tape) if and when required; physical models can only have a finite amount. Classes of automata (Clicking on each layer links to the article on that subject.) A Turing machine is a mathematical model of computation describing an abstract machine [ 1 ] that manipulates symbols on a strip of tape acc
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