NIST

oracle Turing machine

(definition)

Definition: A Turing machine with an extra oracle tape and three extra states q?, qy, qn. When the machine enters q?, control goes to state qy if the oracle tape content is in the oracle set; otherwise control goes to state qn.

See also alternating Turing machine, nondeterministic Turing machine, probabilistic Turing machine, universal Turing machine.

Note: From Algorithms and Theory of Computation Handbook, pages 24-19 and 28-25, Copyright © 1999 by CRC Press LLC. Appearing in the Dictionary of Computer Science, Engineering and Technology, Copyright © 2000 CRC Press LLC.

Author: CRC-A


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Entry modified 17 December 2004.
HTML page formatted Fri Feb 23 10:06:08 2018.

Cite this as:
Algorithms and Theory of Computation Handbook, CRC Press LLC, 1999, "oracle Turing machine", in Dictionary of Algorithms and Data Structures [online], Vreda Pieterse and Paul E. Black, eds. 17 December 2004. (accessed TODAY) Available from: https://www.nist.gov/dads/HTML/oracleTur.html