On May 13, 2012, at 22:25 , bf azi wrote: > What is "Harris-Foulkes estimate"? http://en.wikipedia.org/wiki/Harris_functional P. --- Paolo Giannozzi, Dept of Chemistry&Physics&Environment, Univ. Udine, via delle Scienze 208, 33100 Udine, Italy Phone +39-0432-558216, fax +39-0432-558222