----- Original Message -----
From: "Fabrizio Caruso" <caruso at posso.dm.unipi.it>
To: <maxima at math.utexas.edu>
Sent: Friday, March 31, 2006 9:52 AM
.....
>
> Is there a way to have ratcoeff work when the
> argument is zero without having to check the
> expression?
> This would mean that a programmer would
> have to either prove mathematically that
> in its program the argument is never zero,
> of it this is not possible he/she
> should always check if it is zero.
if you do something like
s:rat(expression),
if (s=0) then ???? else ratcoef(...,s)
then it should always work. What does it mean if s=0 though??
>
> Fabrizio
>
>
>
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