Variations on extending partially defined boolean functions with missing bits

  • Authors:
  • Endre Boros;Toshihide Ibaraki;Kazuhisa Makino

  • Affiliations:
  • RUTCOR, Rutgers University, 640 Bartholomew Road, Piscataway, NJ;Department of Applied Mathematics and Physics, Graduate School of Informatics, Kyoto University, Kyoto 606-8501, Japan;Division of Systems Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan

  • Venue:
  • Information and Computation
  • Year:
  • 2003

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Abstract

In this paper we consider four possible definitions for extending a partially defined Boolean function in which the input contains some missing bits. We show somewhat surprisingly that, for many general and frequently used families of function classes, three of these notions of an extension are mathematically equivalent, though such an equivalence does not hold universally, as demonstrated by several examples.