This repository contains programs to compute integrals with Slater-type atomic orbitals. One-electron integrals are computed using a fit with 20 Gaussians, and two-electron integrals are computed using a stochastic method converging very fast.[1]
[1] "Evaluating two-electron-repulsion integrals over arbitrary orbitals using zero variance Monte Carlo: Application to full configuration interaction calculations with Slater-type orbitals", J. Chem. Phys. 151, 064101 (2019); https://doi.org/10.1063/1.5114703, https://doi.org/10.48550/arXiv.1906.04515