[Pw_forum] question on Nonlinear core correction

[Guoying Gao]

Dear everyone,

         I searched "Nonclear core correction" in pw forum and found
that the core correction is more important for atoms with few valence
electrons. So my question is what is "Nonlinear core correction",  why
it is more important for atoms with few valence electrons? Any
interapretation or suggestion will be welcomed.

Regards!

Guoying
Nab of Superhard Materials
Jilin Univ.
P.R.China