Exploiting zeros on the diagonal in the direct solution of indefinite sparse symmetric linear systems

  • Authors:

  • I. S. Duff;J. K. Reid

  • Affiliations:

  • Rutherford Appleton Lab., Oxon, England, UK;Rutherford Appleton Lab., Oxon, England, UK

  • Venue:
  • ACM Transactions on Mathematical Software (TOMS)
  • Year:
  • 1996

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Abstract

We describe the design of a new code for the solution of sparse indefinite symmetric linear systems of equations. The principal difference between this new code and earlier work lies in the exploitation of the additional sparsity available when the matrix has a significant number of zero diagonal entries. Other new features have been included to enhance the execution speed, particularly on vector and parallel machines.