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Which formulae shrink under random restrictions?
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Source Symposium on Discrete Algorithms archive
Proceedings of the twelfth annual ACM-SIAM symposium on Discrete algorithms table of contents
Washington, D.C., United States
Pages: 702 - 708  
Year of Publication: 2001
ISBN:0-89871-490-7
Authors
Hana Chockler  School of Computer Science and Engineering, The Hebrew University, Givat Ram, Jerusalem 91904, Israel
Uri Zwick  School of Computer Science, Raymond and Beverly Sackler, Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel
Sponsors
SIGACT: ACM Special Interest Group on Algorithms and Computation Theory
SIAM : Society for Industrial and Applied Mathematics
Publisher
Society for Industrial and Applied Mathematics  Philadelphia, PA, USA
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Downloads (6 Weeks): 1,   Downloads (12 Months): 14,   Citation Count: 0
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ABSTRACT

We show that the shrinkage exponent, under random restrictions, of formulae over a finite complete basis B of Boolean functions is strictly greater than 1 if and only if all the functions in B are monotone increasing or monotone decreasing in each one of their variables. As a consequence, we get non-linear lower bounds on the formula complexity of the parity function over any basis composed only of monotone increasing or decreasing functions.


REFERENCES

Note: OCR errors may be found in this Reference List extracted from the full text article. ACM has opted to expose the complete List rather than only correct and linked references.

 
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A.E. Andreev. A method for obtaining efficient lower bounds for monotone complexity. Algebra and Logica, 26:1-18, 1987.
 
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A.E. Andreev. On a method for obtaining more than quadratic effective lower bounds for the complexity of a-schemes. Vestnik Moskov. Univ. Mat., 42, 1987. (In Russian.) English translation in Moscow Univ. Math. Bull. 42:63-66, 1987.
 
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E.L. Post. The two-valued iterative systems of mathematical logic. Annals of Math. Studies, 5, 1941. Princeton University Press, N.J.
 
PZ93a
 
PZ93b
M. Paterson and U. Zwick. Shrinkage of de Morgan formulae under restriction. Random Structures Algorithms, 4:135-150, 1993.
 
Rok70
M.M. Rokhlina. On formulae for improving reliability. Problemy Kibernetiki, 23:295-301, 1970. (In Russian.).
 
Sub61
B.A. Subbotovskaya. Realizations of linear functions by formulas using +, *,-. Doklady Akademii Nauk SSSR, 136:553-555, 1961. (In Russian.) English translation in SovietMathematics Doklady, 2:110- 112, 1961.
 
Val84
L.G. Valiant. Short monotone formulae for the majority function. Journal of Algorithms, 5:363-366, 1984.

Collaborative Colleagues:
Hana Chockler: colleagues
Uri Zwick: colleagues