Re: [Axiom-developer] series2.output

[Waldek Hebisch]

> 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.

-- 
                              Waldek Hebisch
address@hidden