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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 -579.0917255
correlated core -579.1064760
difference -0.0147505
  Energy (hartrees)
frozen core -579.1268734
correlated core -579.1407972
difference -0.0139238
  Energy (hartrees)
frozen core -579.1578140
correlated core -579.1721908
difference -0.0143768
  Energy (hartrees)
frozen core -579.1400064
correlated core -579.1543663
difference -0.0143599