It might demand a bit of effort, but the GSL simulated annealing
routines would be adaptable to this type of problem. In fact, the
traveling salesman example in the manual is a discrete problem as
well.

HTH,
- Andrew Steiner
(c.f. O2scl at http://o2scl.sourceforge.net)

On Tue, Sep 16, 2008 at 9:08 AM, Peter <[EMAIL PROTECTED]> wrote:
> I've got a very special function and for that I can only accept solutions and 
> steps consisting of integers and not of double.
>
> Any idea of how I can achieve this?
>
> For now only the initial step works, as I can set it to 1.
>
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