From: <HIDDEN>
Newsgroups: comp.soft-sys.matlab
Subject: Re: Fast Matrix*Diagonal*Matrix operation
Date: Thu, 3 Feb 2011 20:58:04 +0000 (UTC)
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Hi Bruno,

Could you explain why it is so? Thanks.


"Bruno Luong" <b.luong@fogale.findmycountry> wrote in message <ii8c3b$a9r$>...
> "Gongguo Tang" wrote in message <ii7d79$lto$>...
> > 
> > I am wondering if there is any way to obtain Q'*D(t)*Q as fast as possible. Maybe from the result of Q'*Q or some kind of decomposition of Q'*Q?
> > 
> I'm pretty sure the answer is: no, it's not possible.
> Bruno