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Re: [Axiom-developer] series2.output
From: |
Waldek Hebisch |
Subject: |
Re: [Axiom-developer] series2.output |
Date: |
Sat, 3 Feb 2007 18:05:52 +0100 (CET) |
> 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