Here, the wavefunction 𝜓 (𝒓 𝜎 ) is represented as 𝜓 (𝒙 ) for the simplification of the above equation. The Hartree-Fock equation consists of four terms; the first term represents the kinetic energy of electrons while the second term includes the electron-ion potential contribution. The third term, which is known as Hartree potential, is an electrostatic potential, appears due to the charge distribution of N-electrons. The last term, known as the exchange term, arises due to the inclusion of the Pauli principle and determinant form of the wavefunction.