
Re: Inequalities in matrices
Posted:
Apr 23, 2013 9:35 AM


On Mon, 22 Apr 2013 23:37:22 0500, quasi <quasi@null.set> wrote:
>On Mon, 22 Apr 2013 19:55:39 0700 (PDT), gyansorova@gmail.com wrote: > >>If I have >> >>A>B where A and B are the same type of matrices  >>what does this mean? > >It usually means A[i,j] > B[i,j] for all i,j.
Reasonable guess. But you shouldn't post guesses as though they were facts.
What it really means is that A  B is positive definite. Which means that
<(AB) x, x> > 0
for all x <> 0.
> >quasi

