Hi Dave,

On Sep 6, 1:02 pm, "Dr. David Kirkby" <[email protected]> wrote:
> ...
> Do you need to use Random numbers? Can't you just pick a set of integers -
> either those from t2, sage.math, or the lottery numbers, and use them instead?

I don't need these specific numbers. The example was just a concise
way to show that there is a problem.

The randomness is only used internally. Namely, in my cohomology
programs happens the following:

 (1) Input is some group.
 (2) Internally, some additional data are computed, using GAP
functions such as IsomorphismGroups, SylowSubgroup etc. Some of these
functions use a randomized algorithm, and according to gap-support,
GAP does not provide a deterministic version of these algorithms.
 (3) The ring presentation will depend on the internal data computed
in (2).
 (4) In order to write tests (not only to evaluate test results), I
need a computationally unique machine independent ring presentation.

As the example shows, in order to achieve (4) it does not suffice to
reset GAP's random generator, since it is machine dependent.

Best regards,
Simon

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