Noun
Turing machine (plural Turing machines)
(computing theory) An abstract computing machine that has a finite number of possible internal states and operates on an infinite memory tape by first reading a symbol from a cell in the tape, and then, deterministically, based on that symbol and the machine’s state, writing a symbol in that cell, moving to a neighboring cell, and/or changing state.
A decision problem A can be solved in time f(n) if there exists a Turing machine operating in time f(n) that solves the problem. Source: Internet
Alternatively, ZPP can be defined as the class of problems for which a probabilistic Turing machine exists with these properties: * It always runs in polynomial time. Source: Internet
Alan Turing writes, "all digital computers are in a sense equivalent."sfn The widely accepted Church-Turing thesis holds that any function computable by an effective procedure is computable by a Turing machine. Source: Internet
A deterministic Turing machine is the most basic Turing machine, which uses a fixed set of rules to determine its future actions. Source: Internet
A hypothesis called digital physics states that this is no accident, that it is because the universe itself is computable on a universal Turing machine. Source: Internet
A linear bounded automaton is a device which is more powerful than a pushdown automaton but less so than a Turing machine. Source: Internet