Hypervirial and Hellmann‐Feynman Theorems Applied to Anharmonic Oscillators

Quantum Mechanics

1961 • 16,366 citations

Classical and Quantum Mechanical Hypervirial Theorems

1960 • 354 citations

Some Applications of Hypervirial Theorems to the Calculation of Average Values

1962 • 85 citations

Use of Hellmann—Feynman and Hypervirial Theorems to Obtain Anharmonic Vibration—Rotation Expectation Values and Their Application to Gas Diffraction

1966 • 38 citations

Off-Diagonal Hypervirial Theorems as Constraints

1968 • 30 citations

Hypervirial theorems and perturbation theory in quantum mechanics

1965 • 27 citations

Determination of Hypervirial Operators in Perturbation Theory

1967 • 18 citations

Hypervirial Functions and the Positive Powers of the Radial Coordinate Operator in He and H—

1965 • 13 citations

Operator equations in perturbation theory

1967 • 9 citations

Studies of off-diagonal hypervirial constraints

1969 • 8 citations

Note on Hypervirial Theorems

1970 • 5 citations

A note on quantum-mechanical sum rules

1969 • 1 citations