Re: LOGO-L> ToonTalk versus MicroWorlds

[Antonius Haase <A.Haase@in-olpe.de>]

> Please tell me why 0!=1. I can't remember if I've forgotten or maybe I never
> knew!
It's just an agreement (like a^0=1 for a<>0). It helps to define the
binomial coefficients
 n        n!
( ) = ------------
 r     r! (n-r)!

In this way
 n     n
( ) = ( ) = 1
 0     n
is the right factor for the first and the last summand in (a+b)^n = ...

Oh dear, I hope that the format of this message is working and that the
mathematical annotation in english is the same as in german :-)
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