A Remark on the Essential Self-adjointness for Klein–Gordon-Type Operators
نویسندگان
چکیده
We discuss a new simplified proof of the essential self-adjointness for formally self-adjoint differential operators real principal type with null non-trapping condition, previously proved by Vasy (J Spectr Theory 10: 439–461, 2020) and Nakamura-Taira (Ann Henri Lebesgue 4: 1035–1059, 2021). For simplicity, here we second-order cases, i.e., Klein–Gordon-type only.
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ژورنال
عنوان ژورنال: Annales Henri Poincaré
سال: 2023
ISSN: ['1424-0661', '1424-0637']
DOI: https://doi.org/10.1007/s00023-023-01277-2