Module LFTXG in IMSLM

• IMSLM Information

• Components
  • Documentation from ITL
  • Example from ITL

LFTXG

 
Compute the LU factorization of a real general sparse matrix.
 
Classes  :  D2a4 . Solution of systems of linear equations, including matrix
                 inverses, and LU and related factorizations (real
                 nonsymmetric sparse matrices)
 
Type     : Fortran subroutine in IMSLM library.
Access   : Proprietary. Many implementations available.
Precision: Single.
 
Usage    : CALL LFTXG (N, NZ, A, IROW, JCOL, IPARAM, RPARAM, NFAC, NL, FAC,
           IRFAC, JCFAC, IPVT, JPVT)
 
Details  : Documentation Example
Sites    : (1) ITL
 

Implementation of LFTXG from IMSLM on ITL

 
ITL:       Unix Workstation Network, National Institute of Standards and
           Technology (NIST), Gaithersburg, MD. Available to NIST staff.
 
Precision: Single. (Double: DLFTXG)
 
Access available only to NIST staff on internal Unix systems. They may access this
package provided the /itl tree is cross-mounted.
 
   Link         : Login to spruce.nist.gov and see ITL How-To for
                  information on how to setup your environment and link.
   Documentation: cat
                  /home/fetch/Subjects/Math-Stat-Software/imsl/Documentation/lftxg
   Example      : cat
                  /home/fetch/Subjects/Math-Stat-Software/imsl/Examples/lftxg