simple recursion help

[Hung Jung Lu]

Thorsten Kampe <thorsten at thorstenkampe.de> wrote:
> * Hung Jung Lu (2004-10-24 04:16 +0100)
> > (1) "Variation" is the same as "permutation".
> 
> Sorry, no.

Sorry, yes. 

Just to add some more information, see also:

(1) http://en.wikipedia.org/wiki/Combinatorics

(2) Download user manuals from any major scientific calculator maker
(HP, Casio, Texas Instruments, Sharp, etc.), and you will find them
all using the term "permutation" instead of "variation". E.g.:

http://www.hp.com/calculators/docs/guides/33sProbFact.pdf

You can promote your preferred term ("variation") as much as you want,
but to ignore the fact that the majority of people use the term
"permutation" is a bit strange, to say the least.

Hung Jung