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On hash-coding algorithms for partial-match retrieval

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1 Author(s)

We examine the efficiency of generalized hash-coding algorithms for performing partial-match searches of a random-access file of binary words. A precise characterization is given of those hash functions which minimize the average number of buckets examined for a search; and a new class of combinatorial designs is introduced which permits the construction of hash functions with worst-case behavior approaching the best achievable average behavior in many cases.

Published in:

Switching and Automata Theory, 1974., IEEE Conference Record of 15th Annual Symposium on

Date of Conference:

14-16 Oct. 1974