Unbounded Selfadjoint Operators
This chapter introduces the reader to unbounded selfadjoint operators on a complex Hilbert space. We give examples of such operators, describe their elementary properties, and prove the spectral theorem. The main method employed here is to transfer from the unbounded operator to its resolvent and to apply our results for bounded selfadjoint operators.
KeywordsHilbert Space Orthogonal Projection Bounded Linear Operator Symmetric Operator Selfadjoint Operator
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