Re: [Axiom-developer] series2.output

[Gregory Vanuxem]

Le samedi 03 février 2007 à 18:05 +0100, Waldek Hebisch a écrit : 
> > There is a apparently a problem in the Build-improvements branch or may
> > be in GCL, I have no idea (I can reproduce the following on MathAction
> > (build-improvements)):
> > 
> > =======================================================================
> > Gold:
> > 
> > (2) -> f:=taylor(1-x^2)
> > 
> >              2
> >    (2)  1 - x
> >                    Type: UnivariateTaylorSeries(Expression Integer,x,0)
> > (3) -> sin asin f
> > 
> >              2      11
> >    (3)  1 - x  + O(x  )
> > ========================================================================
> > Build-improvements:
> > ========================================================================
> > (11) -> f:=taylor(1-x^2)
> > 
> >               2
> >    (11)  1 - x
> >                   Type: UnivariateTaylorSeries(Expression Integer,x,0)
> > 
> > (12) -> sin asin f
> > 
> >              1  4    1  6    7   8     5   10      11
> >    (12)  1 - - x  - -- x  - --- x  - ---- x   + O(x  )
> >              4      16      768      3072
> >                   Type: UnivariateTaylorSeries(Expression Integer,x,0)
> > ========================================================================
> > 
> 
> AFAICS this is bug 312 in action.  This bug appeared as a byproduct
> of fix for bug 63.  Igor Khavkine found the wrong place and proposed
> a fix, wh-sandbox contains slightly different fix.

Yes you're right, my version of Gold contains the Igor Kahvkine's patch.
Will look in your patches (on my BIG TODO list).

Thanks,

Greg