(algorithm)

**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 2^{p} 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.

HTML page formatted Wed Mar 13 12:42:46 2019.

Cite this as:

Paul E. Black, "multiplication method", in
*Dictionary of Algorithms and Data Structures* [online], Paul E. Black, ed. 24 August 2009. (accessed TODAY)
Available from: https://www.nist.gov/dads/HTML/multiplicationMethod.html