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Energy differences between frozen core and full core for CCSD/aug-cc-pVDZ

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  Energy (hartrees)
frozen core -1590.6731942
correlated core -1590.7014793
difference -0.0282851
  Energy (hartrees)
frozen core -1590.6842559
correlated core -1590.7120199
difference -0.0277640
  Energy (hartrees)
frozen core -1590.6780708
correlated core -1590.7061611
difference -0.0280903