Bill Page wrote:
>
> On Fri, Oct 24, 2008 at 7:08 PM, Waldek Hebisch wrote:
> >>
> > I am not sure if 'fixedPointExquo' is better -- it looks that 'exquo'
> > performs the same computation, but when given nontrivial zero
> > series 'fixedPointExquo' will indefinitly try find nonzero coefficient,
> > while 'exquo' will give up after trying 1000 times.
>
> I am curious. Can you give a simple example of such a nontrivial zero series?
>
s1 := series(sin(x), x = 0)
s2 := series(sin(x), x = 0)
s1 - s2
If one knows how s1 and s2 were obtained, then it is trivial to
see that s1 - s2 is zero. But when you have only a black box to
compute next coefficient, then you can never be sure if result is
exact.
--
Waldek Hebisch
[EMAIL PROTECTED]
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