pdelib(3F)          FORTRAN LIBRARY ROUTINES           pdelib(3F)



NAME
     pdelib - Fortran subprograms for nonlinear partial differen-
     tial equations

SYNOPSIS
     /usr/local/lib/libpde.a

DESCRIPTION
     pdelib is a collection of Fortran subprogram packages  which
     solve  general  systems  of nonlinear initial-boundary-value
     partial differential equations in one or  two  space  dimen-
     sions.

     To link to the library include the option -lpde on the  cf77
     statement. For example,

        cf77 -o myprog myprog.f -lpde

     pdelib was compiled  with  cf77  with  all  default  options
     (including  automatic  vectorization  and  the use of 47-bit
     integers).

     Three user-callable  packages  are  currently  available  in
     pdelib.   Each  solves general nonlinear time-dependent sys-
     tems of partial differential equations with various types of
     boundary conditions. Each is based upon the method of lines.
     In the method of lines the spatial part of the partial  dif-
     ferential  equations  are  discretized, yielding a nonlinear
     system of ordinary differential equations which is, in turn,
     solved  by adaptive software for that problem.  The packages
     are:

     mol1d
     Solves problems in one  space  dimension  with  quasi-linear
     boundary  conditions. Can solve hyperbolic equations with or
     without  discontinuities,  parabolic  equations   (including
     reaction-diffusion  equations).  Uses an equi-spaced spatial
     discretization based on second, fourth, or sixth order accu-
     rate  finite  differences.  (Author:  J.M. Hyman, Los Alamos
     National Lab, Los Alamos,NM 87545)

     pdecol
     Solves problems in one space dimension with general boundary
     conditions.  Initial  conditions  must  satisfy the boundary
     conditions.  The spatial discretization is based on colloca-
     tion  of  piecewise polynomial functions represented using a
     B-spline basis.  Users may select the degree  and  level  of
     continuity  of  the piecewise polynomial solution.  (Author:
     N. Madsen Lawrence Livermore National  Lab,  Livermore,  CA,
     and R.F. Sincovec, RIACS, NASA Ames, Moffett Field, CA)

     pdetwo



Sun Release 4.1      Last change: March 1991                    1






pdelib(3F)          FORTRAN LIBRARY ROUTINES           pdelib(3F)



     Solves problems on  a  rectangular  domain  in  two  spatial
     dimensions  with quasi-linear boundary conditions.  The spa-
     tial discretization is second order accurate finite  differ-
     ences  on  a user-specified rectangular mesh.  (Author: D.K.
     Melgaard and R.F. Sincovec, RIACS, NASA Ames, Moffett Field,
     CA)

DOCUMENTATION
     Detailed on-line documentation for pdelib subprograms can be
     obtained using the NIST help system.  The command

        help package pdelib documentation _n_a_m_e

     obtains the documentation for subprogram _n_a_m_e.  This can  be
     abbreviated to

        hp pdelib doc _n_a_m_e.

     Further information on how to use the  help  system  can  be
     obtained from the help man page or from

        help how-to

SOURCE
     Source code for pdelib subprograms can be obtained using the
     NIST help system.  The command

        help package pdelib source _n_a_m_e

     obtains the source for subprogram _n_a_m_e. This can be abbrevi-
     ated to

        hp pdelib source _n_a_m_e.

FILES
     /usr/local/lib/libpde.a      the library archive file
     /usr/local/apps/pdelib/doc   contains pdelib documentation
     /usr/local/apps/pdelib/src   contains pdelib source

SEE ALSO
     cf77(1), help(1)

BUGS
     mol1d writes its output to unit 3.  mol1d's plotting  option
     has been disabled.










Sun Release 4.1      Last change: March 1991                    2