Definition: The class of languages for which membership can be determined in polynomial time by a probabilistic Turing machine with no false acceptances and less than half false rejections. "RP" means "Randomized Polynomial" time.
Formal Definition: For a language, S, there exists a probabilistic Turing machine, M, that accepts or rejects any string in polynomial time. If w ∉ S, M rejects w. If w ∈ S, M accepts w with a probability at least 1/2.
Also known as randomized polynomial time.
See also NP, ZPP, BPP, Monte Carlo algorithm.
Note: By repeating the run, the chance of incorrect rejection may be arbitrarily reduced.
After [Hirv01, page 19].
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Entry modified 17 December 2004.
HTML page formatted Fri Mar 25 16:20:35 2011.
Cite this as:
Paul E. Black, "RP", in Dictionary of Algorithms and Data Structures [online], Paul E. Black, ed., U.S. National Institute of Standards and Technology. 17 December 2004. (accessed TODAY) Available from: http://www.nist.gov/dads/HTML/rp.html