//www.umsyar.com/wfnbbs/viewtopic.php?id=905 Thu, 30 Nov 2023 14:03:14 +0000 FluxBB //www.umsyar.com/wfnbbs/viewtopic.php?pid=3457#p3457 RI is a general concept and has different specific use in accelerating different kinds of quantum chemistry methods, including DFT, MP2, CC2, -F12 and so on. Introduction to Computational Chemistry (3ed,Frank Jensen,2017) has a good introduction on RI.

]]> Thu, 30 Nov 2023 14:03:14 +0000 //www.umsyar.com/wfnbbs/viewtopic.php?pid=3457#p3457 //www.umsyar.com/wfnbbs/viewtopic.php?pid=3456#p3456 Good afternoon:
My question is very general, but I have not been able to find a detailed and satisfactory answer: what is the RI approach? I have seen that it is used quite a lot, for example, together with CC2, and that it helps in calculation times, but I have not found either by what order of magnitude it speeds up the calculation or a detailed explanation of why it allows faster calculations.
Thanks in advance

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