[obm-l] =?UTF-8?Q?=74=65=6F=72=69=61=20=64=6F=73=20=6E=75=6D=65=72=6F=73?=

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Subject: [obm-l] =?UTF-8?Q?=74=65=6F=72=69=61=20=64=6F=73=20=6E=75=6D=65=72=6F=73?=
From: =?UTF-8?Q?=61=72=74=75=72=20=6C=6F=73=6E=61=6B?= <losnak@xxxxxxxxx>
Date: Wed, 4 Apr 2007 02:47:48 +0300
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prove que (xy+1)(yz+1)(xz+1) é quadrado perfeito se e somente se xy+1, yz+1, xz+1 são quadrados perfeitos

x,y,z inteiros positivos