----- Original Message -----
From: "Dirk Laurie" <[EMAIL PROTECTED]>
>> {{{
>> sage: exp(log(64)/3)
>> 4.0
>> }}}
> Well, that works for the cube root of 64. But note it's 4.0, not 4.
> This exposes one to roundoff errors, which the other two methods
> avoid.
Well, that can be avoided by increasing the number of digits. Anyway, the
winner is 64.nth_root(3) suggested by Didier Deshommes in another thread.
I'd like to make a suggestion to add th_root method to all domains where
nth_root is implemented, working as 3.th_root(64) in this example, with
aliases st_root, nd_root and rd_root, so that it could be executed as
3.rd_root(64) that looks more natural to me than 64.nth_root(3).
Alec
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