Module NSPCG in ITPACK

• ITPACK Information

• Components
  • Fullsource from NETLIB
  • Manual from ARNO
  • Manual from NETLIB
  • Quick-Reference from ARNO
  • Quick-reference from NETLIB
  • Test-1 from NETLIB
  • Test-2 from NETLIB
  • Test-3 from NETLIB
  • Test-4 from NETLIB
  • Test-5 from NETLIB

NSPCG

 
A package for solving large sparse linear systems by various iterative methods. A
wide selection of preconditioners and accelerators is available for both
symmetric and nonsymmetric coefficient matrices. Several sparse matrix data
structures are available to represent matrices, including a matrix-free format
in which the user supplies basic matrix-vector operations. Designed for
efficient use on vector processors.
 
Classes  :  D2a4 . Solution of systems of linear equations, including matrix
                 inverses, and LU and related factorizations (real
                 nonsymmetric sparse matrices)
            D2b4 . Solution of systems of linear equations, including matrix
                 inverses, and LU and related factorizations (real symmetric
                 sparse matrices)
 
Type     : Fortran subroutine in ITPACK package.
Access   : Public domain. Portable.
Precision: Single.
Note     : Manual and Quick-Reference are Postscript documents
 
Usage    : CALL NSPCG (PRECON, ACCEL, NDIM, MDIM, N, MAXNZ, COEF, JCOEF, P, IP,
           U, UBAR, RHS, WKSP, IWKSP, NW, INW, IPARM, RPARM, IER)
 
Details  : Fullsource Manual Quick-Reference Quick-reference Test-1 Test-2
           Test-3 Test-4 Test-5
Sites    : (1) ARNO (2) NETLIB
 

Implementation of NSPCG from ITPACK on ARNO

 
ARNO:      Silicon Graphics Origin 2000, National Institute of Standards and
           Technology (NIST), Gaithersburg, MD. Available to NIST staff.
 
Precision: Single.
Note     : Manual and Quick-Reference are Postscript documents
 
Those logged in to arno.nist.gov or amur.nist.gov may access this module as
follows.
 
   Access       : See nspcg man page.
   Quick-Referen: lpr /usr/local/apps/nspcg/doc/quick.ref.ps
   Manual       : lpr /usr/local/apps/nspcg/doc/nspcg.guide.ps
 

Implementation of NSPCG from ITPACK on NETLIB

 
NETLIB:    Public access repository, The University of Tennessee at
           Knoxville and Bell Laboratories
 
Precision: Single.
Note     : Manual and Quick-Reference are Postscript documents
 
You may access components from NETLIB outside GAMS as follows.
 
   Fullsource   : echo 'send nspcg1.f nspcg2.f nspcg3.f nspcg4.f nspcg5.f
                  from ITPACK' | mail netlib@ornl.gov
   Quick-referen: echo 'send quick.tex from ITPACK' | mail netlib@ornl.gov
   Manual       : echo 'send usernsp.tex from ITPACK' | mail netlib@ornl.gov
   Test-3       : echo 'send tstnsp3.f from ITPACK' | mail netlib@ornl.gov
   Test-2       : echo 'send tstnsp2.f from ITPACK' | mail netlib@ornl.gov
   Test-1       : echo 'send tstnsp1.f from ITPACK' | mail netlib@ornl.gov
   Test-5       : echo 'send tstnsp5.f from ITPACK' | mail netlib@ornl.gov
   Test-4       : echo 'send tstnsp4.f from ITPACK' | mail netlib@ornl.gov