The Kolmogorov complexity of an input is formally defined as the simplest number of states used to encode that input in these models, which are formally defined with a 7-tuple.
Mark Burgin discussed "inductive" types of these things in an article that treats their process of generating "words" as closely resembling the task of calculating a real number to a desired precision. The Kolmogorov complexity of an input is formally defined as the simplest number of states used to encode that input in these models, which are formally defined with a 7-tuple. Treating these things as black boxes, or (*)  "oracles", is often done in proofs that make use of polynomial-time reductions. The namesake of these things determined that asking if they halt is undecidable. A head that reads and writes bits on an infinite tape is one component of, for 10 points, what entities that closely model computers, and which are named for a British computer scientist?
Mark Burgin discussed "inductive" types of these things in an article that treats their process of generating "words" as closely resembling the task of calculating a real number to a desired precision.
Turing machine s [prompt on  machine s or  abstract machine s or  abstract computer s] 