multiplication method


Definition: A hash function that uses the first p bits of the key times an irrational number.

Formal Definition: h(k) = ⌊ m(k A (mod 1))⌋, where m is usually an integer 2p and A is an irrational number (or an approximation thereto) 0 < A < 1. The modulo 1 operation removes the integer part of k × A.

Author: PEB

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Entry modified 24 August 2009.
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Cite this as:
Paul E. Black, "multiplication method", in Dictionary of Algorithms and Data Structures [online], Vreda Pieterse and Paul E. Black, eds. 24 August 2009. (accessed TODAY) Available from: