19.01.2015 Views

MOLPRO

MOLPRO

MOLPRO

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

14 INTEGRATION 90<br />

THRQ2 LMP2<br />

THRAO ATTEN<br />

Threshold used in the second and subsequent quarter transformations.<br />

Defaults: [THR LMP2, THRINT DTRAF, THR DTRAF, THRINT,<br />

default].<br />

Special threshold for prescreening of attenuated integrals (µµ|νν)<br />

Default: THREST LMP2<br />

Options for integral-direct computation of external exchange operators (DKEXT):<br />

DKEXT<br />

Selects driver for DKEXT.<br />

DKEXT=−1: use paging algorithm (minimum memory). This<br />

is automatically used if in-core algorithm would need more<br />

than one integral pass.<br />

DKEXT=0: use in-core algorithm, no integral triples.<br />

DKEXT=1: use in-core algorithm and integral triples.<br />

DKEXT=2: use in-core algorithm and integral triples if at least<br />

two integrals of a triple differ.<br />

DKEXT=3: use in-core algorithm and integral triples if all integrals<br />

of a triple differ.<br />

SCREEN DKEXT<br />

MAXSIZE DKEXT<br />

MINSIZE DKEXT<br />

MAXCEN DKEXT<br />

SCREEN DKEXT<br />

PRINT DKEXT<br />

SWAP DKEXT<br />

MXMBLK DKEXT<br />

if given, replaces value of SCREEN for DKEXT.<br />

Largest size of merged shells in DKEXT (0: not used).<br />

Shells are only merged if their size is smaller than this value.<br />

(0: not used).<br />

Maximum number of centres in merged shells (0: no limit).<br />

Enables of disables screening in DKEXT.<br />

Print parameter for DKEXT.<br />

Enables of disables label swapping in DKEXT (test purpose<br />

only)<br />

Largest matrix block size in DKEXT (only used with DKEXT≥<br />

1).<br />

Thresholds for integral-direct computation of external exchange operators (DKEXT):<br />

THR DKEXT<br />

THREST DKEXT<br />

THRINT DKEXT<br />

THRPROD DKEXT<br />

THRMAX DKEXT<br />

General threshold for DKEXT. If given, this is used as a default<br />

for all DKEXT thresholds described below.<br />

Prescreening threshold for DKEXT.<br />

Defaults: [THR DKEXT, THREST, default].<br />

Integral threshold for DKEXT.<br />

Defaults: [THR DKEXT, THRINT, default].<br />

Product threshold for DKEXT.<br />

Defaults: [THR DKEXT, THRPROD, default].<br />

Initial value for THREST DKEXT in CI, and CCSD calculations.<br />

If nonzero. it will also be used for DKEXT in MP3<br />

and MP4(SDQ) calculations. The threshold will be reduced to<br />

THREST DKEXT once a certain accuracy has been reached (see<br />

VARRED), or latest after MAXRED iterations. The initial thresholds<br />

THRINT DKEXT and THRPROD DKEXT are obtained by<br />

multiplying their input (or default) values by THRMAX DKEXT/THREST DKEXT,

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!