Module 575 in TOMS

• TOMS Information

• Components
  • Fullsource from NETLIB

575

 
MC21A: a subroutine for finding a row permutation for a zero-free diagonal. That
is, given the pattern of nonzeros of a sparse matrix, this routine attempts to find
a permutation of its rows that makes the matrix have no zeros on its diagonal. (See
I.S. Duff, ACM TOMS 7 (1981) pp. 387-390.).
 
Classes  :  D2e . Operations associated with the solution of systems of linear
                equations, including matrix inverses, and LU and related
                factorizations (e.g., matrix reorderings)
 
Type     : Fortran software in TOMS collection.
Access   : Some uses prohibited. Portable.
Precision: Single.
 
Usage    : CALL MC21A (N, ICN, LICN, IP, LENR, IPERM, NUMNZ, IW)
 
Details  : Fullsource
Sites    : (1) NETLIB
 

Implementation of 575 from TOMS on NETLIB

 
NETLIB:    Public access repository, The University of Tennessee at
           Knoxville and Bell Laboratories
 
Precision: Single.
 
You may access components from NETLIB outside GAMS as follows.
 
   Fullsource   : echo "send 575 from toms" | mail netlib@ornl.gov