R (complexity)
R (complexity)
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R (complexity)

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R (complexity)

In computational complexity theory, R is the class of decision problems solvable by a Turing machine, which is the set of all recursive languages (also called decidable languages).

R is equivalent to the set of all total computable functions in the sense that:

Since we can decide any problem for which there exists a recogniser and also a co-recogniser by simply interleaving them until one obtains a result, the class is equal to REco-RE.

Complexity Zoo: Class R

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