Module D03PHF in NAG

• NAG Information

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

D03PHF

 
Integrates a system of linear or nonlinear parabolic partial differential
equations (PDEs) in one space variable, with scope for coupled ordinary
differential equations (ODEs). The spatial discretisation is performed using
finite differences, and the method of lines is employed to reduce the PDEs to a
system of ODEs. The resulting system is solved using a backward differentiation
formula method or a Theta method (switching between Newton's method and
functional iteration).
 
Classes  :  I2a1a . Parabolic partial differential equations in one spatial
                  dimension
 
Type     : Fortran subroutine in NAG library (D03 sublibrary).
Access   : Proprietary. Many implementations available.
Precision: Double.
 
Usage    : CALL D03PHF(NPDE, M, TS, TOUT, PDEDEF, BNDARY, U, NPTS, X, NCODE,
           ODEDEF, NXI, XI, NEQN, RTOL, ATOL, ITOL, NORM, LAOPT, ALGOPT, W, NW,
           IW, NIW, ITASK, ITRACE, IND, IFAIL)
 
See also : D03PZF
 
Details  : Documentation Example Example-output
Sites    : (1) AIX (2) ITL
 

Implementation of D03PHF 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/D03/d03phf_fl19.pdf
   Example      : cat
                  /itl/apps/naglib-19/flib619da/examples/source/d03phfe.f
   Example-outpu: cat
                  /itl/apps/naglib-19/flib619da/examples/results/d03phfe.r
 

Implementation of D03PHF 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/D03/d03phf_fl19.pdf
   Example      : cat
                  /itl/apps/naglib-19/flib619da/examples/source/d03phfe.f
   Example-outpu: cat
                  /itl/apps/naglib-19/flib619da/examples/results/d03phfe.r