MODp-tests, almost independence and small probability spaces

Extended abstract
  • Claudia Bertram-Kretzberg
  • Hanno Lefmann
Part of the Lecture Notes in Computer Science book series (LNCS, volume 1200)


We consider approximations of probability distributions over ℤ p n . We present an approach to estimate the quality of approximations towards the construction of small probability spaces which are used to derandomize algorithms. In contrast to results by Even et al. [13], our methods are simple, and for reasonably small p, we get smaller sample spaces. Our considerations are motivated by a problem which was mentioned in recent work of Azar et al. [5], namely, how to construct in time polynomial in n a good approximation to the joint probability distribution of i.i.d. random variables X1,...,X n where each X i has values in {0,1}. Our considerations improve on results in [5].


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Copyright information

© Springer-Verlag Berlin Heidelberg 1997

Authors and Affiliations

  • Claudia Bertram-Kretzberg
    • 1
  • Hanno Lefmann
    • 1
  1. 1.Lehrstuhl Informatik IIUniversität DortmundDortmundGermany

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