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## Re: [Axiom-mail] sum()

**From**: |
Martin Rubey |

**Subject**: |
Re: [Axiom-mail] sum() |

**Date**: |
Tue, 22 Jun 2004 08:59:04 +0000 |

You tried:
>* f: Integer -> Integer;*
>* f(0)==1; f(1)==2;*
>* f(n)==sum(f(i)*f(n-i), i=0..(n-1))*
Try
f: Integer -> Integer;
f(0)==1; f(1)==2;
f(n)==reduce(+,[f(i)*f(n-i) for i in 1..(n-1)])
I have no good explanation why sum won't work. (Well, I know why it happens
internally. I'm looking for a solution...)
Martin