An Educational Hartree-Fock Code in Python: Transparent Implementation of Gaussian-Type Integrals, SCF Procedures, and Geometry Optimization
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Updated
Feb 6, 2026 - Python
An Educational Hartree-Fock Code in Python: Transparent Implementation of Gaussian-Type Integrals, SCF Procedures, and Geometry Optimization
Python-based localized-orbital Density Functional Theory code for educational purposes.
Implementation of two-electron repulsion integrals (ERIs) via Non-Uniform Fast Fourier Transform on adaptive Becke grids, Cartesian GTOs (s/p/d), FINUFFT Type-3, relative error 4.54e-6 vs 10% for uniform FFT, 23000x accuracy improvement with 114x fewer grid points, validated against Boys function.
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