Yale Sparse Matrix Package. II. The Nonsymmetric Codes

Abstract

Consider the NxN system of linear equations M x = b, where the coefficient matrix M is large, sparse, and nonsymmetric. Assume that M can be factored in the form M = L D U, where L is a lower triangular matrix, D is a diagonal matrix, and U is a unit upper triangular matrix. Such systems arise frequently in scientific computation, e.g., in finite difference and finite element approximations to non-self-adjoint elliptic boundary value problems. This report presents a package of efficient, reliable, well-documented, and portable FORTRAN subroutines for solving these systems.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1977
Accession Number
ADA047725

Entities

People

  • A. H. Sherman
  • M. C. Gursky
  • Martin H. Schultz
  • S. C. Eisenstat

Organizations

  • Yale University

Tags

DTIC Thesaurus Topics

  • Algorithms
  • Boundary Value Problems
  • Coefficients
  • Compression
  • Computations
  • Computer Science
  • Computers
  • Difference Equations
  • Efficiency
  • Electrical Engineering
  • Engineering
  • Equations
  • Errors
  • Linear Systems
  • Lists (Data Structures)
  • Real Variables
  • Sparse Matrix

Readers

  • Computer Science.
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Linear Algebra