Variational Principles for Single-Particle Expectation Values in the Hartree Approximation

Note on an Approximation Treatment for Many-Electron Systems

1934 • 13,955 citations

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1959 • 744 citations

Two-Electron Atoms II. A Perturbation Study of Some Excited States

1963 • 122 citations

Analysis of Electron Correlation in Two-Electron Systems. I. H−, He, and Li+

1969 • 85 citations

On Errors in Hartree—Fock Calculations

1963 • 82 citations

Criteria of Accuracy of Approximate Wavefunctions

1970 • 68 citations

A variation principle for arbitrary operators

1963 • 55 citations

Variational Principles

1967 • 54 citations

Variational Principles for Expectations

1968 • 33 citations

Error estimates for atomic and molecular quantities

1965 • 29 citations

Lower bounds to expectation values

1968 • 29 citations

Variation principles for an arbitrary operator (II)

1963 • 26 citations

Upper and Lower Bounds to Expectation Values

1970 • 24 citations

New Formulas for Lower Bounds to Expectation Values

1969 • 24 citations

The variational calculation of expected values for the helium atom

1967 • 22 citations

Variational Extensions of Lower Bounds to Expectation Values

1970 • 17 citations

Analytic Calculation of the Coherent Atomic Scattering Factor for the Ground State of the Helium Isoelectronic Sequence

1972 • 16 citations

Calculation of expectation values correct to second order applied to the ground state of the helium isoelectronic sequence

2009 • 15 citations

Improved lower bounds to expectation values

1968 • 11 citations

Variational Principles for Expectation Values Applied to the Ground State of the Helium Isoelectronic Sequence

1971 • 9 citations

Variation principles for an arbitrary operator. III

1965 • 9 citations

Error Bounds to Expectation Values

1971 • 8 citations

Remarks on the calculation of upper and lower limits to quantum-mechanical properties

2009 • 5 citations