Property $$(UW{\scriptstyle \Pi })$$ under perturbations
Property $$(UW{\scriptstyle \Pi })$$ under perturbations
Abstract Property $$(UW {\scriptstyle \Pi })$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mo>(</mml:mo><mml:mi>U</mml:mi><mml:mi>W</mml:mi><mml:mstyle><mml:mi>Π</mml:mi></mml:mstyle><mml:mo>)</mml:mo></mml:mrow></mml:math> , introduced in Berkani and Kachad (Bull Korean Math Soc 49:1027–1040, 2015) and studied more recently in Aiena and Kachad (Acta Sci Math (Szeged) 84:555–571, 2018) may be thought as a variant of Browder’s theorem, or Weyl’s theorem, for bounded linear operators …