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  Absolutely continuous spectrum preservation: A new proof for unitary operators under finite-rank multiplicative perturbations

  Pablo A. Díaz

  701–712

  2025-12-25
• 

  On the approximation of the δ-shell interaction for the 3-D Dirac operator

  Mahdi Zreik

  489–505

  2024-12-11
• 

  Some norm inequalities for accretive Hilbert space operators

  Baharak Moosavi, Mohsen Shah Hosseini

  327–340

  2024-08-09

• On centralizers of standard operator algebras with involution

  Maja Fosner, Benjamin Marcen, Nejc Sirovnik

  45-50

  2013-10-01