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Energy differences between frozen core and full core for MP2/cc-pVTZ

19 06 19 13 52
For ()
  Energy (hartrees)
frozen core -553.3353793
correlated core -553.4336934
difference -0.0983141
  Energy (hartrees)
frozen core -553.3375819
correlated core -553.4357349
difference -0.0981529