Learning unions of ω(1)-dimensional rectangles

  • Authors:
  • Alp Atıcı;Rocco A. Servedio

  • Affiliations:
  • Columbia University, New York, NY;Columbia University, New York, NY

  • Venue:
  • ALT'06 Proceedings of the 17th international conference on Algorithmic Learning Theory
  • Year:
  • 2006

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Abstract

We consider the problem of learning unions of rectangles over the domain [b]n, in the uniform distribution membership query learning setting, where both b and n are “large”. We obtain poly(n, logb)-time algorithms for the following classes: – poly (n logb)-Majority of $O(\frac{\log(n \log b)} {\log \log(n \log b)})$-dimensional rectangles. –Unions of poly(log(n logb)) many rectangles with dimension $O(\frac{\log^2 (n \log b)} {(\log \log(n \log b) \log \log \log (n \log b))^2})$. – poly (n logb)-Majority of poly (n logb)-Or of disjoint rectangles with dimension $O(\frac{\log(n \log b)} {\log \log(n \log b)})$ Our main algorithmic tool is an extension of Jackson's boosting- and Fourier-based Harmonic Sieve algorithm [13] to the domain [b]n, building on work of Akavia et al. [1]. Other ingredients used to obtain the results stated above are techniques from exact learning [4] and ideas from recent work on learning augmented AC0 circuits [14] and on representing Boolean functions as thresholds of parities [16].