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RE: DURBAN-2003

• To: Multiple recipients of list <ecacomsig@iucr.org>
• Subject: RE: DURBAN-2003
• From: "David Watkin" <david.watkin@chemistry.oxford.ac.uk>
• Date: Fri, 13 Sep 2002 10:44:37 +0100 (BST)

I love to see other peoples attention to detail! Howard Flack has the eyes
of a Lynx.  I think I was probably refering to what is generally known as ML
LS.  What ever the details of the nomencalture, Dale's talk is excellent.

Best wishes
			David

-----Original Message-----
From: ecacomsig@iucr.org [mailto:ecacomsig@iucr.org]On Behalf Of
Alexandre Urzhumtsev/Ourjoumtsev
Sent: 13 September 2002 10:26 am
To: Multiple recipients of list
Subject: RE: DURBAN-2003


Dear David,

>4. Algorithms.  Dale Tonrud does an excellent talk showing how the several
>refinement algorithms are related (from CG to ML).

sorry for a remark non-correlated to the choice of the symposia titles.

Your phrase is very confusing :
- CG (conjugate gradients) is a MINIMISATION TECHNIQUE and
- ML is a CRITERION to be minimised.
         One cannot go from CG to ML

Regards,

Sasha

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