++++++++++++++++++++++++++  FEMoctave  ++++++++++++++++++++++++++++

Version 0.1.2, October 16, 2001

This package allows to solve second order elliptic differential equations 
in two variables:

 div(a*grad u) - b*u = f         in the domain domain
         u =  gD      Dirichlet boundary conditions on first part of boundary
   a*du/dn =  gN      Neumann condition on the other part of the boundary
                       
If the functions a, b f, gD and gN are given, then a numerical approximation 
is computed, using the method of finite elements.

Some documentation and examples are shown in the Postscript file FEMdoc.ps .

Installation instructions can be found in install.txt. Those who do not like 
to read may type `make install' on the command line.

The source code for the mesh generator triangle by Jonathan Richard Shewchuk
is included. Information on  triangle can be found on the WWW page
http://www.cs.cmu.edu/~quake/triangle.html

To generate meshes the program EasyMesh can be used too. Its home page is at
http://www-dinma.univ.trieste.it/~nirftc/research/easymesh/
It can also be found on this authors home-page. There is also a precompiled 
version of EasyMesh for MS systems. For the examples in ./demos/* the meshes
are already generated and thus the package can be tested without EasyMesh.



FEEDBACK IS WELCOME

This code will most likely be useful for educational purposes only.  
It was developed and tested on a Linux system and thus will behave the same 
on all Unix systems. I will try to help to get it up and running. 
The Octave version 2.1.31 was used. At short test to build the '*.oct' files 
with version 2.0.13 failed. If the '*.oct' do not work then it is possible to
use function files '*.m' only. Have a look at './demos/demo3/demorun.m' .
On MS based systems you are on your own.

If you like it, let me know. If you have suggestions on how to improve the 
package, let me know. There is some obvious space for improvement. If you 
think it is a piece of .... , delete it and don't tell anybody. 


Help was provided by
- Grant Gustafson, University of Utah


Enjoy this day

Andreas

========================================================
Andreas.Stahel@hta-bi.bfh.ch
http::/www.hta-bi.bfh.ch/~sha