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Removed information on the Chachiyo functional. The original paper is cited 22 times, making it far too irrelevant for an encyclopedia. Judging by the user name, Teepanis Chachiyo himself added the information on his work to this article without any disclaimer. |
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* Cole-Perdew (CP) <ref>{{cite journal | title = Calculated electron affinities of the elements | author = L. A. Cole and J. P. Perdew | journal = Phys. Rev. A | volume = 25 | pages = 1265–1271 | year = 1982 | doi = 10.1103/PhysRevA.25.1265 |bibcode = 1982PhRvA..25.1265C | issue = 3 }}</ref>
* Perdew-Wang (PW92) <ref name=pw92>{{cite journal | title = Accurate and simple analytic representation of the electron-gas correlation energy | author = John P. Perdew and Yue Wang | journal = Phys. Rev. B | volume = 45 | pages = 13244–13249 | year = 1992 | doi = 10.1103/PhysRevB.45.13244 | pmid = 10001404 |bibcode = 1992PhRvB..4513244P | issue = 23 }}</ref>
* Chachiyo formula <ref name="ChachiyoFormula">{{cite journal |last1=Chachiyo |first1=Teepanis |title=Simple and accurate uniform electron gas correlation energy for the full range of densities |journal=The Journal of Chemical Physics |date=14 July 2016 |volume=145 |page=021101 |doi=10.1063/1.4958669 |url=https://aip.scitation.org/doi/full/10.1063/1.4958669}}</ref> and its modification <ref name="ModifiedChachiyo">{{cite journal |last1=Pinsook |first1=Udomsilp |title=Modified Chachiyo Formula for Correlation Energy of Uniform Electron Gas |journal=Thai Journal of Physics |date=30 September 2020 |volume=37 |page=117 |url=https://ph01.tci-thaijo.org/index.php/ThaiJPhys/article/view/242002}}</ref>
Predating these, and even the formal foundations of DFT itself, is the Wigner correlation functional obtained [[Møller–Plesset perturbation theory#Rayleigh-Schr.C3.B6dinger perturbation theory|perturbatively]] from the HEG model.<ref name=wigner>{{cite journal | title = On the Interaction of Electrons in Metals | author = E. Wigner | journal = Phys. Rev. | volume = 46 | pages = 1002–1011 | year = 1934 | doi = 10.1103/PhysRev.46.1002 |bibcode = 1934PhRv...46.1002W | issue = 11 }}</ref>
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