Perturbation series (in powers of delta) for the ground state energy:

- A program (there, lambda means
*g*) - The first 102 coefficients of the perturbation series

Summation of the perturbation series:

- A program
- Results of summation - energy (real and complex parts) and estimated number of correct digits vs lambda and delta

Plots of ionization energy (i.e. -*E*):

- Dependence on lambda, near lambda=1
- Dependence on lambda, 0<lambda<2
- Comparison with ionization energy of two-electron ions as a function of
lambda=1/
*Z*

Back to Results of work in Purdue University.

Designed by A. Sergeev.