In computability theory, a set P of functions
is said to be Medvedev-reducible to another set Q of functions
when there exists an oracle Turing machine which computes some function of P whenever it is given some function from Q as an oracle.
[1] Medvedev reducibility is a uniform variant of Mučnik reducibility, requiring a single oracle machine that can compute some function of P given any oracle from Q, instead of a family of oracle machines, one per oracle from Q, which compute functions from P.[2] This mathematical logic-related article is a stub.
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