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Talk:Set compositions
Comment on: Number of set compositions over set N2
This formula has a problem: it is valid only for k = m..2m. (Otherwise a factorial of a negative integer appears). And this should be indicated! Therefore it is more advantageous to write
Similar remarks apply to the other formulas. I will change only the case n = 2 and leave the other cases to the original author. — Peter Luschny 15:08, 25 April 2011 (UTC)
Thanks for your coments, in my original paper (still unpublished) is done the formula you mentioned.I plane to ad here. However these formulas are equivalent — Adi Dani 15:45, 25 April 2011 (UTC)
No contradictions
dear Peter you wrote However, since (: we have discovered a contradiction!)
Based on symmetric of binomial coeficients
we get that
- --Adi Dani 14:42, 26 April 2011 (UTC)
I wrote nonsense! I apologize. Peter Luschny 15:10, 26 April 2011 (UTC)
Accepted, you are great man. I hope that in future we can collaborate.--Adi Dani 15:25, 26 April 2011 (UTC)