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Worst case number of terms in symmetric multiple-valued functions

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Author
Schueller, Kriss A.
Butler, Jon T.
Date
1991-05
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Abstract
A symmetric multiple-valued function can be realized as the disjunction of fundamental symmetric functions. A simpler disjunction can be formed when the latter functions combine in the same way that minterms combine to form simpler product terms for sum-of-products expressions. We solve a problem posed by Muzio [7], who seeks the worst case symmetric function in the sense that the maximum number of fundamental symmetric functions is needed. The worst case is presented for 3- and 4-valued systems in 171, but the case for general radix is left open. We solve this problem for general radix, and show that the ratio of the maximum size of the disjunction to the total number of fundamental symmetric functions approaches one-half as the number of variables increases.
Description
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. As such, it is in the public domain, and under the provisions of Title 17, United States Code, Section 105, may not be copyrighted.
 
 
Proceedings of the 21st International Symposium on Multiple-Valued Logic, May 1991, pp. 94-101
 
URI
https://hdl.handle.net/10945/35750
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