Global Hyperbolicity and Self-adjointness
arXiv:2410.04879 · doi:10.1016/j.geomphys.2025.105505
Abstract
We show that the spatial part of the Klein-Gordon operator is an essentially self-adjoint operator on the Cauchy surfaces of various classes of spacetimes. Our proof employs the intricate connection between global hyperbolicity and geodesically complete Riemannian surfaces, and concludes by proving global hyperbolicity of the spacetimes under study.
18 pages, matches published version
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