Concurrent Iterative Algorithm for Toeplitz-like Linear Systems

  • Authors:
  • V. Y. Pan

  • Affiliations:
  • -

  • Venue:
  • IEEE Transactions on Parallel and Distributed Systems
  • Year:
  • 1993

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Abstract

A nonsingular n*n matrix A is given with its short displacement generator. It has smalldisplacement rank bounded by a fixed constant. The class of such matrices generalizesToeplitz matrices. A good initial approximation to a short displacement generator forA/sup -1/ is readily available. Ways to refine this approximation and numerically compute a displacement generator of A/sup -1/ and the solution vector x=A/sup -1/b to a linear system Ax=b by using O(log/sup 2/n) parallel arithmetic steps and n processors arepresented. These results are extended to some other important classes of densestructure matrices.