[Pw_forum] phonon_S matrix not positive definite

Masoud Rahbar masoudrahbar09 at gmail.com
Sat Sep 9 22:57:44 CEST 2017


Hi QE users
I am doing phonon calculation for NiMn. but except gamma point in any other
point, it gives the error "s matrix not positive definite". plz help me
because I am struggling with this for weeks.
Masoud Rahbar
Tarbiat Modares University
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