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14 INTEGRATION 88<br />

THR D3EXT<br />

THREST D3EXT<br />

THRINT D3EXT<br />

THRPROD D3EXT<br />

THR D4EXT<br />

THREST D4EXT<br />

THRINT D4EXT<br />

THRPROD D4EXT<br />

THR DCCSD<br />

THREST DCCSD<br />

THRINT DCCSD<br />

THRPROD DCCSD<br />

THRMAX DCCSD<br />

General threshold for generation of 3-external integrals. If given,<br />

this is used as a default for all D3EXT thresholds described below.<br />

Prescreening threshold for generation of 3-external integrals.<br />

Defaults: [THR D3EXT, THREST DTRAF, THR DTRAF, THREST,<br />

default].<br />

Integral threshold for generation of 3-external integrals.<br />

Defaults: [THR D3EXT, THRINT DTRAF, THR DTRAF, THRINT,<br />

default].<br />

Product threshold for generation of 3-external integrals.<br />

Defaults: [THR D3EXT, THRPROD DTRAF, THR DTRAF, THRPROD,<br />

default].<br />

General threshold for generation of 4-external integrals. If given,<br />

this is used as a default for all D4EXT thresholds described below.<br />

Prescreening threshold for generation of 4-external integrals.<br />

Defaults: [THR D4EXT, THREST DTRAF, THR DTRAF, THREST,<br />

default].<br />

Integral threshold for generation of 4-external integrals.<br />

Defaults: [THR D4EXT, THRINT DTRAF, THR DTRAF, THRINT,<br />

default].<br />

Product threshold for generation of 4-external integrals.<br />

Defaults: [THR D4EXT, THRPROD DTRAF, THR DTRAF, THRPROD,<br />

default].<br />

General threshold for generalized transformation needed in each<br />

CCSD iteration. If given, this is used as a default for THREST DCCSD,<br />

THRINT DCCSD, and THRPROD DCCSD described below.<br />

Prescreening threshold for DCCSD transformation.<br />

Defaults: [THR DCCSD, THREST DTRAF, THR DTRAF, THREST,<br />

default].<br />

Integral threshold for DCCSD transformation.<br />

Defaults: [THR DCCSD, THRINT DTRAF, THR DTRAF, THRINT,<br />

default].<br />

Product threshold for DCCSD transformation.<br />

Defaults: [THR DCCSD, THRPROD DTRAF, THR DTRAF, THRPROD,<br />

default].<br />

Initial value for THREST DCCSD in CCSD calculations. The<br />

threshold will be reduced to THREST DCCSD once a certain<br />

accuracy has been reached (see VARRED), or latest after MAXRED<br />

iterations. The initial thresholds THRINT DCCSD and THRPROD DCCSD<br />

are obtained by multiplying their input (or default) values by<br />

THRMAX DCCSD/THREST DCCSD, with the restriction that the<br />

initial values cannot be smaller than the final ones.<br />

Specific options for direct MP2 (DMP2):

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