[obm-l] Dúvida Matrizes

To: obm-l@xxxxxxxxxxxxxx
Subject: [obm-l] Dúvida Matrizes
From: "Diego Alex Silva" <diego.questoes@xxxxxxxxx>
Date: Sun, 23 Sep 2007 11:01:13 -0300
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Determine todas as matrizes X, reais, de dimensões 2x2, tais que AX = XA, para toda matriz A real 2x2

Se alguém puder ajudar....

Grato,