Counterexamples Related to Commutators of Unbounded Operators
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math.OA
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commutatorscounterexamplesoperatorsunboundedbonuscounterexampledevotedexample
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The present paper is exclusively devoted to counterexamples about commutators and self commutators of unbounded operators on a Hilbert space. As a bonus, we provide a simpler counterexample than McIntosh's famous example obtained some while ago.
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