[obm-l] OLIMPIADA

To: obm-l@xxxxxxxxxxxxxx
Subject: [obm-l] OLIMPIADA
From: Klaus Ferraz <klausferraz@xxxxxxxxxxxx>
Date: Tue, 14 Feb 2006 22:32:05 +0000 (GMT)
DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com.br; h=Message-ID:Received:Date:From:Subject:To:MIME-Version:Content-Type:Content-Transfer-Encoding; b=mbSRqT+Hca6aqtqrTOCr6eE9YU7Slnoq3lNNfnMwodJEuhEN9MFiYYvK/sqqN/Em7bxT6OgKID3kIqepXyZedrCVHlIcARSCHqrDbp3AAyFyNR+HSr12Y24w9TY7QUTnnApVqkpO2QT3o1yKo/tZhk2ePIz6PNjQNADkQOXiEkw= ;
Reply-To: obm-l@xxxxxxxxxxxxxx
Sender: owner-obm-l@xxxxxxxxxxxxxx

Prove que, dentre quaisquer cinco reais y1,y2,y3,y4,y5, existem dois que satisfazem:

0<=(yi - yj)/1+yiyj<=1