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Topic: Matrix question
Replies: 5   Last Post: Mar 4, 2013 7:45 PM

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Ken.Pledger@vuw.ac.nz

Posts: 1,348
Registered: 12/3/04
Re: Matrix question
Posted: Mar 4, 2013 7:45 PM
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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.



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