----- Original Message -----
Sent: Thursday, March 20, 2003 2:30
PM
Subject: [obm-l] Re: [obm-l] Algebra
Linear-Aplica�ao legal
A � mxn, B � nxm ==> A*B � mxm
m > n ==>
posto(A) <= n e posto(B) <= n
==>
posto(A*B) <= posto(A) <= n
Logo, A*B � uma matriz mxm cujo posto � n < m
==>
A*B � singular ==>
det(A*B) = 0.
Um abra�o,
Claudio.