Fast unimodular reduction: planar integer lattices

  • Authors:
  • C. K. Yap

  • Affiliations:
  • Courant Inst., New York Univ., NY, USA

  • Venue:
  • SFCS '92 Proceedings of the 33rd Annual Symposium on Foundations of Computer Science
  • Year:
  • 1992

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Abstract

The author shows that a shortest basis for the 2-dimensional lattice Lambda (u, v) generated by an input pair u, v in Z/sup 2/ can be computed in O(M(n) log n) where n is the bit-size of the input numbers and M(n) is the complexity of multiplying two n-bit integers. This generalizes Schonhage's technique (1971) for fast integer GCD to a higher dimension.