  We consider an electronic bound state of the usual, non-relativistic,
molecular Hamiltonian with Coulomb interactions and fixed nuclei. Away from
appropriate collisions, we prove the real analyticity of all the reduced
densities and density matrices, that are associated to this bound state. We
provide a similar result for the associated reduced current density.Published:
J. Math. Phys. 63, 013509 (2022); https://doi.org/10.1063/5.0056488
