On Thu, Mar 22, 2012 at 8:14 AM, William Stein <wst...@gmail.com> wrote:
> On Thu, Mar 22, 2012 at 7:55 AM, Håkan Granath <hakan.gran...@gmail.com> 
> wrote:
>> The following code fails for me (on Ubuntu 10.10, 32 bit, Sage 4.8
>> compiled from source):
>>
>> m=sqrt(sin(pi/5))
>> AA(m).minpoly()
>>
>> I also fails on http://sagemath.org/eval.html
>>
>> /Håkan
>>
>>
>> ----------------------------------------------------------------------
>> | Sage Version 4.8, Release Date: 2012-01-20                         |
>> | Type notebook() for the GUI, and license() for information.        |
>> ----------------------------------------------------------------------
>> sage: m=sqrt(sin(pi/5))
>> sage: m.minpoly() # works
>> x^8 - 5/4*x^4 + 5/16
>> sage: QQbar(m).minpoly() # works
>> x^8 - 5/4*x^4 + 5/16
>> sage: AA(m).minpoly() # does not work
>>  ...
>>  <snip>
>>  ...
>> TypeError: Unable to convert number to real interval.
>
> This is now http://trac.sagemath.org/sage_trac/ticket/12727

There is now a patch up, waiting for somebody to review it!

William

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