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Energy differences between frozen core and full core for QCISD(T)/daug-cc-pVTZ

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For ()
  Energy (hartrees)
frozen core -580.4464076
correlated core -580.5774841
difference -0.1310765
  Energy (hartrees)
frozen core -580.4476018
correlated core -580.5782165
difference -0.1306147
  Energy (hartrees)
frozen core -580.4118332
correlated core -580.5455766
difference -0.1337434