As is the case of the Hylleraas six‐term wave function, it is shown that several Hylleraas and Kinoshita wave functions for two‐electron atoms given in the literature are not sufficiently accurate particularly in their exponents ζ. For example, Kinoshita reported that his 80‐term helium wave function has the minimum energy of −2.903 723 7 a.u. for ζ=1.855 199, while we obtain −2.903 724 347 a.u. for ζ=2.245 896.
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In the present study, the generalized eignevalue problem is solved by the Choleski decomposition followed by Householder’s method.
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© 1991 American Institute of Physics.
1991
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