Module F04AGF in NAG

• NAG Information

• Components
  • Documentation from ITL
  • Example from ITL
  • Example-input from ITL
  • Example-output from ITL

F04AGF

 
Calculates the approximate solution of a set of real symmetric positive definite
linear equations with multiple right hand sides, AX=B, where A has been
decomposed into triangular matrices A = LL(transpose) using F03AEF.
 
Classes  :  D2b1b . Solution of systems of linear equations, including matrix
                  inverses, and LU and related factorizations (real
                  symmetric positive definite matrices)
 
Type     : Fortran subroutine in NAG library (F04 sublibrary).
Access   : Proprietary. Many implementations available.
Precision: Double.
 
Usage    : CALL F04AGF (N, IR, A, IA, P, B, IB, X, IX)
 
See also : F03AEF
 
Details  : Documentation Example Example-input Example-output
Sites    : (1) AIX (2) ITL
 

Implementation of F04AGF from NAG on AIX

 
AIX:       IBM RS6000, National Institute of Standards and Technology (NIST),
           Gaithersburg, MD. Available to NIST staff.
 
Precision: Double.
 
Access available only to NIST staff on internal Unix systems. They may access this
package provided the /itl tree is cross-mounted.
 
   Link         : f77 -o prog prog.f -L/itl/links/generic/lib -lnag
   Documentation: acroread
                  /itl/apps/naglib-19/docs/NAGdoc/fl/pdf/F04/f04agf_fl19.pdf
   Example      : cat
                  /itl/apps/naglib-19/flib619da/examples/source/f04agfe.f
   Example-input: cat
                  /itl/apps/naglib-19/flib619da/examples/data/f04agfe.d
   Example-outpu: cat
                  /itl/apps/naglib-19/flib619da/examples/results/f04agfe.r
 

Implementation of F04AGF from NAG on ITL

 
ITL:       Unix Workstation Network, National Institute of Standards and
           Technology (NIST), Gaithersburg, MD. Available to NIST staff.
 
Precision: Double.
 
Access available only to NIST staff on internal Unix systems. They may access this
package provided the /itl tree is cross-mounted.
 
   Link         : f77 -o prog prog.f {-lcomplib.sgimath}
                  -L/itl/links/generic/{lib lib32 lib64}{/mips3 /mips4}
                  -lnag
   Documentation: acroread
                  /itl/apps/naglib-19/flib619da/NAGdoc/fl/pdf/F04/f04agf_fl19.pdf
   Example      : cat
                  /itl/apps/naglib-19/flib619da/examples/source/f04agfe.f
   Example-input: cat
                  /itl/apps/naglib-19/flib619da/examples/data/f04agfe.d
   Example-outpu: cat
                  /itl/apps/naglib-19/flib619da/examples/results/f04agfe.r