Complete Solution of Hadamard's Problem for the Scalar Wave Equation on Petrov type III Space-Times

2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/58044We prove that there are no Petrov type III space-times on which the conformally invariant (self-adjoint) scalar wave equation or the non-self-adjoint scalar wave equation satisfies Huygens' principle.22 pagesMathematical Physics35L15, 83C20, 83C60Complete Solution of Hadamard's Problem for the Scalar Wave Equation on Petrov type III Space-Timestext