Lindner, MarkoMarkoLindnerSchmeckpeper, DennisDennisSchmeckpeper2022-06-262022-06-262023Opuscula mathematica 43 (1): 101–108 (2023)http://hdl.handle.net/11420/12951For a bounded linear operator on a Banach space, we study approximation of the spectrum and pseudospectra in the Hausdorff distance. We give sufficient and necessary conditions in terms of pointwise convergence of appropriate spectral quantities.en1232-927420231101108AGH Univ. of Science and Technology Presshttps://creativecommons.org/licenses/by/4.0/Mathematics - Functional AnalysisMathematics - Functional AnalysisMathematics - Spectral TheoryMathematikJournal Article10.15480/882.480710.7494/OpMath.2023.43.1.10110.15480/882.48072206.04978v1Journal Article