CCL: Negative frequency problem

From: "Jos I. Garc a" <jig%a%unizar.es>
Subject: CCL: Negative frequency problem
Date: Wed, 13 Jun 2007 03:37:54 -0400

 Sent to CCL by: "Jos   I. Garc  a" [jig _ unizar.es]
 Hi Gary,
 If your system and/or your computational resources allow it, try the
 old, but usually effective OPT=(TS,CalcAll,...). A second, small,
 negative frequency, associated to a low-energy torsion is really a
 pain in the neck, and if we could simply ignore it, it would be great.
 However, try to eliminate it first. You'll feel better after...
 Jos I. Garca
 CSIC Research Professor
 Instituto de Ciencia de Materiales de Aragon
 CSIC-Universidad de Zaragoza
 E-50009 Zaragoza (Spain)