Alain,
Very good idea. A Set it's much better than an OrderedCollection. Already
changed that. Now when the solution is in both cases 0, it returns only (0)
and not (0 0). And also intuitively I agree with you that the solutions of
an equation are a set.
Thanks!
Nacho

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Nacho
Smalltalker apprentice.
Buenos Aires, Argentina.
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