Huygens' Principle for the Non-Self-Adjoint Scalar Wave Equation on Petrov type III Space-Times
W. G. Anderson, R. G. McLenaghan, F. D. Sasse
Abstract
We 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.
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