FORTRAN NUMERICAL CODES:

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• The very simple fortran code for the calculation of the energy and the wave function
  of the ground state of the helium ion, including minimization with respect to nonlinear parameters
  is here,
  It is based on the Korobov's work Phys. Rev. A 61, 064503 (2000).
  Wave function is represented in terms of Exp(-a r1 - b r2 - c r12)
  with different nonlinear parameters, chosen randomly.
• The fortran source code for the calculation of three electron wave function and energy using Hylleraas basis set and recursion relations
  is here, The relevant papers: Phys. Rev. A 70, 032502 (2004) and Phys. Rev. A 71, 032514 (2005) are here.
  It has not been intensively tested nor optimized for speed, but it is fast anyway.
  This source code compiles with Intel Fortran ifort, and Lahey Fortran lf95, other compilers have not been tested.
• H2SPECTRE: The fortran source code for the calculation of rovibrational levels and transition frequencies in ground electronic state of hydrogen molecule and isotopologues is here, The relevant paper is published in Phys. Rev. A 100, 032519 (2019), manuscript available here.