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<div class="moz-cite-prefix">plane waves form an orthonormal basis
set.<br>
<br>
whether this defines a generalized eigenvalue problem or not
depends on what you use planewaves for.<br>
If they expand the full vawefunction (as in norm-conserving PP)
you have a normal eigenvalue problem , <br>
if you expand the pseudo part of a wfc that needs to be augmented
to reconstruct the charge density (USPP or PAW) a generalized
eigenvalue problem results.<br>
<br>
stefano<br>
<br>
On 10/03/2012 01:00 PM, Padmaja Patnaik wrote:<br>
</div>
<blockquote
cite="mid:1349262048.26797.YahooMailNeo@web171201.mail.ir2.yahoo.com"
type="cite">
<pre wrap="">Hi All
I have a query. Anybody please can explain this.If you use the plane wave basis, will you have generalized eigenvalue problem?
Padmaja Patnaik
Research Scholar
Dept of Physics
IIT Bombay
Mumbai, India
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