Subspace Iteration Algorithms in FORTRAN 77 and FORTRAN 8x

Abstract

This report describes a USA Fortran ANSI X3.9-1978 implementation of the Rutishauser-Reinsch subspace iteration algorithm for partial solution of the algebraic eigenvalue problem for a real matrix symmetric relative to a prescribed inner product. Also included is a corresponding description of the algorithm in the proposed Fortran 8x standard using the CFT77 compiler and the CRAY X-MP processor of Cray Research, INC. Source code for both algorithms will be available to DoD qualified requestors in the form of a 5-1/4 in. diskette formatted under MS/DOS.

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Document Details

Document Type
Technical Report
Publication Date
Dec 30, 1988
Accession Number
ADA212275

Entities

People

  • Paul J. Nidkolai

Organizations

  • Wright Laboratory

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Accuracy
  • Aeronautical Laboratories
  • Air Force
  • Algorithms
  • Compilers
  • Computer Programs
  • Computers
  • Eigenvalues
  • Eigenvectors
  • Environment
  • Errors
  • Numerical Analysis
  • Precision
  • Procedures (Computers)
  • Residuals
  • Standards
  • Translations

Readers

  • Computer Science.
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Library and Information Science