Re: TWO questions to experts ...

[Aiviet Nguyen <aiviet@cat.syr.edu>]

Sure, there are quite a lot in Fortran and in C. You can also write one 
by yourself if no additional requirements are needed.
The standard library package of CERN or CORNELL has very good error control
and very stable.
  The program does not know that the equation has solution or not. So if 
you specify a smalll error, the algorithm will not be convergent and will 
loop forever. If you specify a large enough error, it will output some 
solution depending on the starting point.
  Cheers
  Aiviet
PS: Are you interested in the Algorithm they use in those packages?

On Wed, 26 Mar 1997, Sonnet Nguyen wrote:

> Hi all,
> My questions are following:
> 
> 1)IS THERE A GOOD PROGRAMME WHICH CAN SOLVE (numerically) THE SCHRODINGER
>   EQUATION WITH (ARBITRARY) BOUNDARY-INITIAL CONDITIONS?
> 
> 2)Does exist a program which can solve (numerically) a large class
>   of partial differential equations 2-nd orders (ellitic, parabolic,
>   hyperbolic) with arbitrary boundary conditions?
> 
> BTW. 
>   How could do this program when a equation with fixed boundary conditions
>   has no solution?
> 
>