tag:blogger.com,1999:blog-3599722177679860131.post9175786755332159997..comments2022-11-23T11:24:15.248+01:00Comments on Chemical Quantum Images: Density fitting and tensor hyper contractionFelixhttp://www.blogger.com/profile/05138335803929997277noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-3599722177679860131.post-14103718649096992132013-09-29T10:02:44.482+01:002013-09-29T10:02:44.482+01:00I have not really thought it through in detail, bu...I have not really thought it through in detail, but what your are saying makes sense ...<br /><br />With an increasing number of sampling points this sum should resemble the exact integral more and more. And then Z_PQ should approach 1/(rP-rQ).Felixhttps://www.blogger.com/profile/05138335803929997277noreply@blogger.comtag:blogger.com,1999:blog-3599722177679860131.post-48072981842793430662013-09-28T22:53:49.245+01:002013-09-28T22:53:49.245+01:00As written in a basis of grid points, the THC fact...As written in a basis of grid points, the THC factorization just looks like evaluation of the double integral by quadrature, in which case Z_{PQ} should just be 1/(rP-rQ) up to weighting factors. Is this a useful way to think about it, or is it more subtle than this?Timnoreply@blogger.com