|Author||Sager, Thomas J.|
|Source||ACM Digital Library|
|Publisher||Association for Computing Machinery (ACM)|
|Abstract||A perfect hash function PHF is an injection F from a set W of M objects into the set consisting of the first N nonnegative integers where N ⩾ M. If N = M, then F is a minimal perfect hash function, MPHF. PHFs are useful for the compact storage and fast retrieval of frequently used objects such as reserved words in a programming language or commonly employed words in a natural language.The mincycle algorithm for finding PHFs executes with an expected time complexity that is polynomial in M and has been used successfully on sets of cardinality up to 512. Given three pseudorandom functions h0, h1, and h2, the mincycle algorithm searches for a function g such that F(w) = (h0(w) + g ° h1(w) + g ° h2(w)) mod N is a PHF.|
|Description||Affiliation: Univ. of Missouri-Rolla, Rolla (Sager, Thomas J.)|
|Age Range||18 to 22 years ♦ above 22 year|
|Education Level||UG and PG|
|Learning Resource Type||Article|
|Publisher Place||New York|
|Journal||Communications of the ACM (CACM)|
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