https://cr-sparse.readthedocs.io/en/latest/source/_autosummary/cr.sparse.lop.symmetrize.html
cr.sparse.lop.symmetrize — cr-sparse documentation
sparselopsymmetrizedocumentation
https://triqs.github.io/solid_dmft/3.3.x/_ref/util.symmetrize_gamma_file.html
util.symmetrize_gamma_file — solid_dmft documentation
utilsymmetrizegammafilesolid
https://psicode.netlify.app/psi4manual/1.4.0/api/psi4.driver.qcdb.vib.hessian_symmetrize
hessian_symmetrize
hessiansymmetrize