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[obm-l] (2m)!(2n)!/(m!n!(m+n)!)

To: "obm-l" <obm-l@xxxxxxxxxxxxxx>
Subject: [obm-l] (2m)!(2n)!/(m!n!(m+n)!)
From: "claudio\.buffara" <claudio.buffara@xxxxxxxxxxxx>
Date: Fri, 2 Jun 2006 18:13:27 -0300
Reply-To: obm-l@xxxxxxxxxxxxxx
Sender: owner-obm-l@xxxxxxxxxxxxxx

Algu�m conhece algum problema de combinat�ria cuja resposta seja:

(2m)!(2n)!/(m!n!(m+n)!) ?

Eu estou tentando provar que este n�mero � inteiro, quaisquer que sejam m e n naturais mediante um argumento combinat�rio, mas at� agora n�o consegui.

[]s,

Claudio.

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