2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/58040We prove that if the non-self-adjoint scalar wave equation satisfies Huygens' principle on Petrov type III space-times, then it is equivalent to the conformally invariant scalar wave equation.17 pagesMathematical Physics35L15, 83C20, 83C60Huygens' Principle for the Non-Self-Adjoint Scalar Wave Equation on Petrov type III Space-Timestext