Learning functions of k relevant variables

  • Authors:
  • Elchanan Mossel;Ryan O'Donnell;Rocco A. Servedio

  • Affiliations:
  • Microsoft Research, One Microsoft Way, Redmond, WA;Department of Mathematics, MIT, Cambridge, MA;Department of Computer Science, Columbia University, New York, NY and Division of Engineering and Applied Sciences, Harvard University, 33 Oxford Street, Cambridge, MA

  • Venue:
  • Journal of Computer and System Sciences - Special issue: STOC 2003
  • Year:
  • 2004

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Abstract

We consider a fundamental problem in computational learning theory: learning an arbitrary Boolean function that depends on an unknown set of k out of n Boolean variables. We give an algorithm for learning such functions from uniform random examples that runs in time roughly (nk)ω/ω+1, where ω nk time bound which can be achieved via exhaustive search. Our algorithm and analysis exploit new structural properties of Boolean functions.