Does anyone know of a good reference for the spectral theorem (projection valued measure version) for possibly unbounded normal operators? I would also be interested in examples where this sort of theorem still holds for non-normal operators. Thanks!
2026-03-26 12:40:10.1774528810
Reference for spectral theorem for normal operators.
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There is a lot of detail in Section 5.6 of Kadison-Ringrose (Fundamentals of the Theory of Operator Algebras).