Re: schaums outlines

On Thu, 26 Oct 2006 09:47:13 GMT, "Jeremy Watts"
<stevie4545@xxxxxxxxxxx> wrote:

excuse this very basic question, but i am reading 'schaums outlines linear
algebra' and on p.285 there is a statement relating a matrix A to its
adjoint adjA, this states :-

A(adjA) = (adjA)A = I


surely this should read:-

A(adjA) = (adjA)A = |A| I

shouldnt it...??


Yes, and just above the typo is a reference to problem 8.34, where the
theorem is written correctly and proven.

FWIW, see also <http://en.wikipedia.org/wiki/Adjugate> toward the
bottom of the page under the heading 'Applications'.

HTH

.