[Pw_forum] The negative frequencies in the calculation of phonon.

[Paolo Giannozzi]

On Oct 31, 2007, at 3:17 , shoutian sun wrote:

>  the frequencies in *.dyn1 is negative(about -1.67895THz).

see http://www.quantum-espresso.org/wiki/index.php,
chapter "Troubleshooting", items 1.34 and 1.35

Paolo
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Paolo Giannozzi, Dept of Physics, University of Udine
via delle Scienze 208, 33100 Udine, Italy
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