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Even though the manual says, on the page on LSORBIT,

"If you have read the previous lines, you will realize that it is recommended to set GGA_COMPAT=.FALSE. for non collinear calculations in VASP.4.6, since this improves the numerical precision of GGA calculations. "

I could not find any information on this key word anywhere. Could someone explain what GGA_COMPAT does?

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