Re: Curious behavior of Taylor series

On 21 Aug 2006 12:01:55 +0200, Martin Rubey <[email protected]> wrote:
> "Igor Khavkine" <[email protected]> writes:
>
> > OK, but the following definitely looks like a bug.
> >
> > (279) -> monx := monomial(1,1)$UTS(EXPR INT,x,0)
> >    (279)  x
> >                          Type: UnivariateTaylorSeries(Expression Integer,x,0)
> > (281) -> sqrt(monx*monx)
> > (281) ->
> >    (281)  1
> >                          Type: UnivariateTaylorSeries(Expression Integer,x,0)
>
> Yes, that's a bug. Please submit a report and fix it :-)
>
> you can see what's going on by saying
>
> )tr UTS )ma
>
> However, it seems that sqrt is not defined in UTS itself. So you'll have to
> find out where it is defined and that trace that constructor.
>
> If you need more support, please ask for it.

I've filed a bug report (#312) and I have a tentative fix for it. But
I'm having trouble testing it. I've copied the culprit file
algebra/sttaylor.spad into my current working dir and modified it.
Issuing the command )compile sttaylor compiled the file. However, the
old definition of sqrt is still being invoked. How do I force the code
from sttaylor.spad in my working directory to take priority?

Thanks.

Igor