On the Circuit Complexity of Random Generation Problems for Regular and Context-Free Languages

  • Authors:
  • Massimiliano Goldwurm;Beatrice Palano;Massimo Santini

  • Affiliations:
  • -;-;-

  • Venue:
  • STACS '01 Proceedings of the 18th Annual Symposium on Theoretical Aspects of Computer Science
  • Year:
  • 2001

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Abstract

We study the circuit complexity of generating at random a word of length n from a given language under uniform distribution. We prove that, for every language accepted in polynomial time by 1-NAuxPDA of polynomially bounded ambiguity, the problem is solvable by a logspace-uniform family of probabilistic boolean circuits of polynomial size and O(log2 n) depth. Using a suitable notion of reducibility (similar to the NC1-reducibility), we also show the relationship between random generation problems for regular and context-free languages and classical computational complexity classes such as DIV, L and DET.