On Sun, 17 Jan 2010 11:52:30 +0100
Rafael Fourquet <rafael.fourq...@gmail.com> wrote:

> I find the following counter-intuitive:
> 
> sage: i^2
> -1
> sage: a = (1-i) * x ; a
> -(I + 1)*x
> sage: a.coeff(x,1)
> -I + 1
> 
> Is this a bug?
> It made me make an error in the subject of an exam I wrote.

This is #7876 on trac:

http://trac.sagemath.org/sage_trac/ticket/7876

It will be fixed in the next release of Sage which should come soon
after the bug days are over.

Sorry about your exam. 


Thanks.

Burcin
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