libintlh

libintlh is an open-source software library used in computational chemistry for the evaluation of electron repulsion integrals over Gaussian-type orbitals. It appears to be related to Libint, a widely used library that provides routines for computing Gaussian basis electron integrals essential for ab initio quantum chemical calculations. Public documentation for libintlh is limited, and the exact origin, authorship, and maintenance status are not clearly established in major public repositories.

The library is described in available metadata as focusing on high-performance evaluation of integrals, potentially as a derivative or fork of Libint. While specific features vary by release, libraries in this domain typically offer interfaces to construct one- and two-electron integrals for common Gaussian basis sets, support a range of angular momenta, and provide parallel execution options to speed up calculations.

In typical use, libintlh would be integrated into electronic-structure codes that require efficient integral evaluation, such as Hartree-Fock and post-Hartree-Fock methods. Users supply molecular geometry and basis-set information, and the library computes the necessary integrals for the solver.

License and distribution information for libintlh is not consistently documented in public sources; potential users should consult the repository or package distribution from which libintlh is obtained to confirm licensing, compatibility, and maintenance status.

See also: Libint, Electron repulsion integral, Gaussian basis set, Quantum chemistry.