On Aug 29, 12:02 pm, Nick Alexander <[EMAIL PROTECTED]> wrote:
> With a little work, Carl Witty's marvelous QQbar implementation could
> help. His code will do the "doubling precision" part for you, and you
> can ask if any particular root is real -- but I found some bugs doing
> this, shown below.
...
> {{{
> sage: t = (ZZ['x'].0^2 - 2).roots(QQbar)[0][0]
> sage: t.real()
> [-1.4142135623730952 .. -1.4142135623730949]
> sage: t.real() == t
> ---------------------------------------------------------------------------
> AttributeError Traceback (most recent call
> last)
This bug was fixed in Sage 3.1.
Carl
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