Date: Mar 4, 2013 7:45 PM
Author: Ken.Pledger@vuw.ac.nz
Subject: Re: Matrix question
In article <mb2aj8dureebf24kpg9uv0o5athsbnn5lc@4ax.com>,

quasi <quasi@null.set> 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. :-(

Ken Pledger.