Subject: WORDS LOCAL AND NONLOCAL IN DFT

From: elewars <[email-masked]>
Date: Wed, 21 Jun 2000 16:04:34 -0400

Wednesday, 2000 June 21

Hello,

Does any one know why DFT functionals without gradient corrections are
called _local_, while gradient-corrected functionals are called
_nonlocal_? I am not asking about the theory behind these, but why these
terms are used. I know that nonlocal has a certain meaning in quantum
physics; does it have some special meaning in connection with
mathematical functions or functionals?  The term nonlocal applied to
gradient-corrected functional has been said to be mathematically wrong
(A. St-Amant, Reviews in Computational chemistry, vol. 7, chapter 5,
1996; p. 223).

Thanks

E. Lewars
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