[obm-l] Matrizes

To: obm-l@xxxxxxxxxxxxxx
Subject: [obm-l] Matrizes
From: Klaus Ferraz <klausferraz@xxxxxxxxxxxx>
Date: Wed, 28 Jun 2006 17:39:11 +0000 (GMT)
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Sejam M e N matrizes do tipo n x n distintas tais que:

(i) M^3=N^3

(ii)MN^2=NM^2

É possível que X = M^2+ N^2 seja inversível?

A e B são matrizes de ordem n tais que AB + A + B=0. Prove que AB=BA.

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