A Depth-Universal Circuit

  title={A Depth-Universal Circuit},
  author={Stephen A. Cook and H. James Hoover},
  journal={SIAM J. Comput.},
This paper describes a family of depth-universal circuits. For any n, c, d there is a universal circuit U(n, c, d) that can simulate any circuit a having n inputs, of size c and depth d, and U has depth O(d) and size O(c3d/log c). The construction is used to give an alternative proof of a theorem of Ruzzo showing the invariance under different uniformity conditions of complexity classes defined by uniform circuit families. 
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A unified approach

  • 1983


  • Toronto, Ontario, Canada, Dec.
  • L. Ruzzo, On uniform circuit
  • 1979

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