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On the minimization of SOPs for bi-decomposition functions

Published: 30 January 2001 Publication History

Abstract

A function f is AND bi-decomposable if it can be written as f (X1,X2) = h1(X1)h2(X2). In this case, a sum-of-products expression (SOP) for f is obtained from minimum SOPs (MSOP) for h1 and h2 by applying the law of distributivity. If the result is an MSOP, then the complexity of minimization is reduced. However, the application of the law of distributivity to MSOPs for h1 and h2 does not always produce an MSOP for f. We show an incompletely specified function of n(n-1) variables that requires at most n products in an MSOP, while 2(n-1) products are required by minimizing the component functions separately. We introduce a new class of logic functions, called orthodox functions, where the application of the law of distributivity to MSOPs for component functions of f always produces an MSOP for f . We show that orthodox functions include all functions with three or fewer variables, all symmetric functions, all unate functions, many benchmark functions, and few random functions with many variables.

References

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R. K. Brayton, G. D. Hactel, C. T. Mc-Mullen, and A. Sangiovanni-Vincentelli, Logic Minimization Algorithms for VLSI Synthesis, Norwall, MA, Kluwer Academic Publishers, April 1984.
[2]
R. S. Michalski and Z. Kulpa, "A system of programs for the synthesis of switching circuits using the method of disjoint stars," Proceedings of IFIP Congress, pp. 61-65, April 1971.
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A. Odlyzko, "On covering a product of sets with products of subsets," Discrete Mathematics, pp. 373-380, 1973.
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W. J. Paul, "Realizing Boolean functions on disjoint set of variables," Theoretical Computer Science 2, pp. 383-396, 1976.
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R. L. Rudell and A. Sangiovanni-Vincentelli, "Multiple-valued minimization for PLA optimization," IEEE Trans. Computer- Aided Design, vol. CAD-6, No. 5 pp. 727-749, September 1987.
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T. Sasao and M. Matsuura, "DECOMPOS: An integrated system for functional decomposition," 1998 International Workshop on Logic Synthesis, Lake Tahoe, pp. 471-477, June 1998.
[7]
B. Voight and I. Wegener, "A remark on minimal polynomials of Boolean functions," CSL'88, 2nd Workshop on Computer Science Logic Proceedings, pp. 372-383, 1989.

Cited By

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  • (2015)Algorithmic issues of AND-decomposition of boolean formulasProgramming and Computing Software10.1134/S036176881503003241:3(162-169)Online publication date: 1-May-2015
  • (2004)A fast method to derive minimum SOPs for decomposable functionsProceedings of the 2004 Asia and South Pacific Design Automation Conference10.5555/1015090.1015250(585-590)Online publication date: 27-Jan-2004
  • (2003)Large-scale SOP minimization using decomposition and functional propertiesProceedings of the 40th annual Design Automation Conference10.1145/775832.775872(149-154)Online publication date: 2-Jun-2003
  • Show More Cited By

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cover image ACM Conferences
ASP-DAC '01: Proceedings of the 2001 Asia and South Pacific Design Automation Conference
January 2001
662 pages
ISBN:0780366344
DOI:10.1145/370155
Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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Association for Computing Machinery

New York, NY, United States

Publication History

Published: 30 January 2001

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Cited By

View all
  • (2015)Algorithmic issues of AND-decomposition of boolean formulasProgramming and Computing Software10.1134/S036176881503003241:3(162-169)Online publication date: 1-May-2015
  • (2004)A fast method to derive minimum SOPs for decomposable functionsProceedings of the 2004 Asia and South Pacific Design Automation Conference10.5555/1015090.1015250(585-590)Online publication date: 27-Jan-2004
  • (2003)Large-scale SOP minimization using decomposition and functional propertiesProceedings of the 40th annual Design Automation Conference10.1145/775832.775872(149-154)Online publication date: 2-Jun-2003
  • (2002)Two-Level Logic MinimizationLogic Synthesis and Verification10.1007/978-1-4615-0817-5_1(1-27)Online publication date: 2002

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