William Stein wrote:
> On 1/14/08, John Cremona <[EMAIL PROTECTED]> wrote:
>> Jaap is right:
>>
>> Compare
>>
> 
> I've created and posted a patch here:
> 
>    http://trac.sagemath.org/sage_trac/ticket/1776
> 
> Refereeing would be appreciated!
> 

Works for me!

----------------------------------------------------------------------
| SAGE Version 2.10.alpha2, Release Date: 2008-01-11                 |
| Type notebook() for the GUI, and license() for information.        |
----------------------------------------------------------------------


sage: f(x)=-x

sage: f(2)
  -2


Jaap


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