On parallel implementation of the one-sided Jacobi algorithm for singular value decompositions

  • Authors:
  • B. B. Zhou;R. P. Brent

  • Affiliations:
  • -;-

  • Venue:
  • PDP '95 Proceedings of the 3rd Euromicro Workshop on Parallel and Distributed Processing
  • Year:
  • 1995

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Abstract

In this paper we give evidence to show that in one-sided Jacobi SVD computation the sorting of column norms in each sweep is very important. Two parallel Jacobi orderings are described. These orderings can generate n(n-1)/2 different index pairs and sort column norms at the same time. The one-sided Jacobi SVD algorithm using these parallel orderings converges in about the same number of sweeps as the sequential cyclic Jacobi algorithm. Some experimental results on a Fujitsu AP1000 are presented. The issue of equivalence of orderings is also discussed.