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. R is equal to the set of all total computable functions.

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 $RE \cap coRE$.

External links

Complexity Zoo: Class R