It is shown that the definition of path integrals without limiting procedure does not give rise to unresolved factor-ordering ambiguities. Any inference from the recent work of Langouche et al. [Phys.

Electromagnetic edge diffraction problems involving parallel half‐planes are traditionally attacked by the Wiener–Hopf technique, or asymptotically for a large wavenumber (k→∞) by ray‐optic techniques ...