#5338: Sage 3.2.2: speed regression/infinite loop for "K.<b> = QQ[a]"
----------------------+-----------------------------------------------------
Reporter: mabshoff | Owner: tbd
Type: defect | Status: new
Priority: critical | Milestone: sage-4.1.2
Component: algebra | Keywords:
Reviewer: | Author:
Merged: |
----------------------+-----------------------------------------------------
Comment(by cremona):
Replying to [comment:5 AlexGhitza]:
> Replying to [comment:2 robertwb]:
> > Hmm, this is insanely slow (i.e. never finishes for me)
> >
> > {{{
> > sage: b = (sqrt(sqrt(2) + 1)/(sqrt(3)) - 1)^(1/3)
> > sage: time QQbar(b).minpoly()
> > }}}
>
> The problem seems to be here:
>
> {{{
> sage: b = (sqrt(sqrt(2) + 1)/(sqrt(3)) - 1)^(1/3)
> sage: c = QQbar(b)
> sage: od = c._descr
> sage: od.exactify() # doesn't seem to finish
> }}}
As far as I can see, the latter is getting into an infinite loop. If that
is right, it's real bug and not just a new inefficiency.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/5338#comment:6>
Sage <http://sagemath.org/>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"sage-trac" group.
To post to this group, send email to [email protected]
To unsubscribe from this group, send email to
[email protected]
For more options, visit this group at
http://groups.google.com/group/sage-trac?hl=en
-~----------~----~----~----~------~----~------~--~---
