Division Is in Uniform TC0

  • Authors:
  • William Hesse

  • Affiliations:
  • -

  • Venue:
  • ICALP '01 Proceedings of the 28th International Colloquium on Automata, Languages and Programming,
  • Year:
  • 2001

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Abstract

Integer division has been known since 1986 [4, 13, 12] to be in slightly non-uniform TC°, i.e., computable by polynomial-size, constant depth threshold circuits. This has been perhaps the outstanding natural problem known to be in a standard circuit complexity class, but not known to be in its uniform version. We show that indeed division is in uniform TC°. A key step of our proof is the discovery of a first-order formula expressing exponentiation modulo any number of polynomial size.