title: Comment on "Gauge-invariant expectation values of the energy of a molecule in an electromagnetic field" [J. Chem. Phys. 144, 044109 (2016)].
abstract: The 'problem' identified in the paper [J. Chem.Phys. 144, 044109 (2016)] does not arise in a properly formulated non-relativistic Hamiltonian formalism for both classical and quantum electrodynamics.
authors: School of Science and Technology, Nottingham Trent University, Nottingham NG11 8NS, United Kingdom.
authors: R Guy
authors: RG
authors: Woolley