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Create menu

• When to use plus/minus displacements to generate Hellmann-Feynman forces?
• Phonons in crystals with strong phonon-magnetic coupling.
• Errors in importing Hellnamm-Feynman forces file HFFILE.

Analyze menu

• Why soft modes can be a sign of incorrect result ?
• Physical reasons to find a soft mode.

Spectroscopy menu

• No comment.

Procedures

• Can surface phonons be calculated?
• Can phonons of solid solutions be calculated?

Installation

• What means Linux Single User?
• Windows or Linux Phonon version?