Date: Mar 4, 2013 7:45 PM
Subject: Re: Matrix question
In article <firstname.lastname@example.org>,
quasi <email@example.com> wrote:
> Ken Pledger wrote far too hastily:
> >You can't mean that. It would just make every diagonal entry
> >1, and give you the identity matrix.
> What about an anti-diagonal matrix?
> What about a transposition matrix?
> What about any permutation matrix of order 2 -- that is,
> a permutation matrix P such that P^2 = I.
> The given condition is equivalent to the requirement that the
> matrix be a product of pairwise disjoint transpositions....
Yes, of course. I hereby shut up. :-(