Separating the polynomial-time hierarchy by oracles

  • Authors:
  • Andrew Chi-Chih Yao

  • Affiliations:
  • -

  • Venue:
  • SFCS '85 Proceedings of the 26th Annual Symposium on Foundations of Computer Science
  • Year:
  • 1985

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Abstract

We present exponential lower bounds on the size of depth-k Boolean circuits for computing certain functions. These results imply that there exists an oracle set A such that, relative to A, all the levels in the polynomial-time hierarchy are distinct, i.e., ΣkP,A is properly contained in Σk+1P,A for all k.