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math.FA2025
On products of symmetries acting on Hilbert spaces
Laurent W. Marcoux, Heydar Radjavi, Yuanhang Zhang
Let be a complex, separable Hilbert space (of finite or infinite dimension), and let denote the group of unitary operators on …
math.FA2024
Invariant embeddings and ergodic obstructions
Mitja Mastnak, Heydar Radjavi
We consider the following question: Let be an abelian self-adjoint algebra of bounded operators on a Hilbert space . Assume that is invaria…