Dear all,

> Siesta is designed for very large systems where, usually, the number of
> symmetries is very small, so it can't use them

This is not entirely true! Using constraints you can force to have 
symmetrical relaxations. This issue was discussed in this e-mail list some 
weeks ago. I think Emilio Artacho suggested to look at Lev Kantorovich's 
SIESTA tool which is indeed very useful. Please, search on the 
SIESTA-list.

Yours,
        Adam 

> On 13/06/2007, at 9:05, Zoya Shah wrote:
> 
> >Dear everyone
> >I just have a question regarding symmetries. Is it possible to use the
> >advantage of symmetries of molecules and particles in order to reduce the
> >number of particles in SIESTA? If so, have any of you done this before?
> >Best regards
> >Zoya
> >
> >
> 

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Dr. Gali Ádám                            Adam Gali, PhD

Budapesti Műszaki és                     Department of Atomic Physics,
Gazdaságtudományi Egyetem,               Budapest University of Technology and
Atomfizika Tanszék                       Economics
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                                         Hungary

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