Unbounded operator ↩

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created: 2021-12-11 00:20:00
modified: 2022-01-10 04:13:03

An unbounded operator on Hilbert space is a linear map from a dense subspace into .

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For technical reasons, in quantum mechanics, we only define unbounded operators on a subspace of the Hilbert space. See Operator boundedness and domain in quantum mechanics.