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Re:Introduction to Hilbert Space [pdf] by ezion on Friday September 15, 2023 @01:12PM (#37526211)
Introduction to Hilbert Space (from a physics perspective)**

I prefer Halmos' book.

Re:Introduction to Hilbert Space [pdf] by Paul-Craft on Friday September 15, 2023 @03:30PM (#37528070)
Do you mean Introduction to Hilbert space and the theory of spectral multiplicity?

Here's a link: https://archive.org/details/introductiontohi0000halm