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## Re: [Axiom-math] newbie type problem

**From**: |
Frank Thieme |

**Subject**: |
Re: [Axiom-math] newbie type problem |

**Date**: |
Mon, 20 Dec 2004 19:33:29 +0100 |

On Mon, 2004-12-20 at 17:25 +0100, Martin Rubey wrote:
>* Frank Thieme writes:*
>* > Thanks for the long answer! I'm using cvs version of axiom of savannah*
>* > if that matters. So I couldn't try out the package solution, yet...*
>* *
>* Yes you can! put it into a file ("test.spad", for example) and say*
>* *
>* )co test.spad*
>* *
>* )sh ABL*
ah, I see. I tried to make a file "ableitung.as" as seen in some example
and it won't find a useful compiler. Ok, that one works...
>* > On Mon, 2004-12-20 at 11:45 +0100, Martin Rubey wrote:*
>* > > or, perhaps better*
>* > > *
>* > > abl(f:POLY FRAC INT,x:Symbol):POLY FRAC INT ==*
>* > > coefficient(f,x,degree(f,x))*degree(f,x)*x^(degree(f,x)-1)*
>* > *
>* > should be FRAC POLY INT instead of POLY FRAC INT - at least it works *
>* then...*
>* *
>* Does this mean, with POLY FRAC INT it does not work? What does not work, *
>* please*
>* provide an example!*
(2) -> abl(x^5,x)
Conversion failed in the compiled user function abl .
Cannot convert from type Expression Integer to Polynomial Fraction
Integer for value
4
5x
No problem at all with FRAC POLY INT.
I'm not that deep in math to understand why... :/