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From: gwyn@brl-tgr.ARPA (Doug Gwyn <gwyn>)
Newsgroups: net.math
Subject: Re: Some Math problems
Message-ID: <5508@brl-tgr.ARPA>
Date: Mon, 29-Oct-84 21:15:52 EST
Article-I.D.: brl-tgr.5508
Posted: Mon Oct 29 21:15:52 1984
Date-Received: Fri, 2-Nov-84 02:49:26 EST
References: dartvax.2503, <689@ihuxt.UUCP> <1493@browngr.UUCP>
Organization: Ballistic Research Lab
Lines: 8

>      Q E Qt
> 
> This method also works for non-symmetric matrices, if they have
> all positive eigenvalues, and all are real, but you must use
> Q inverse rather than Q transpose (alas).

In the original query, the matrix was orthogonal, so its inverse
WAS its transpose.