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CFOUR_GAMMA_ABCDΒΆ

Used to control the handling and storage of two-particle density matrix elements with four virtual indices \Gamma(abcd). DISK (=0) directs the program to calculate and store all elements of \Gamma(abcd), while DIRECT (=1) tells the program to use alternative algorithms in which \Gamma(abcd) is calculated and used “on the fly”. Note that this option might be not available for all type of calculations.

  • Type: string
  • Possible Values: DISK, DIRECT
  • Default: DISK