Editing Coupled cluster (section)

== Historical accounts ==
Kümmel comments:<ref name="Kümmel"/>
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Considering the fact that the CC method was well understood around the late fifties[,] it looks strange that nothing happened with it until 1966, as Jiří Čížek published his first paper on a quantum chemistry problem. He had looked into the 1957 and 1960 papers published in ''Nuclear Physics'' by Fritz and myself. I always found it quite remarkable that a quantum chemist would open an issue of a nuclear physics journal. I myself at the time had almost given up the CC method as not tractable and, of course, I never looked into the quantum chemistry journals. The result was that I learnt about Jiří's work as late as in the early seventies, when he sent me a big parcel with reprints of the many papers he and Joe Paldus had written until then.
</blockquote>

[[Josef Paldus]] also wrote his first-hand account of the origins of coupled-cluster theory, its implementation, and exploitation in electronic wave-function determination; his account is primarily about the making of coupled-cluster theory rather than about the theory itself.<ref>{{cite book | last1 = Paldus | first1 = J. | chapter = The beginnings of coupled-cluster theory: an eyewitness account | editor-last = Dykstra | editor-first = C. | title = Theory and Applications of Computational Chemistry: The First Forty Years | url = https://archive.org/details/theoryapplicatio00dyks | url-access = limited | page = [https://archive.org/details/theoryapplicatio00dyks/page/n114 115] | year = 2005 | publisher = Elsivier B.V.}}</ref>