2 papers
math.NA2023
Finite sections: stability, spectral pollution and asymptotics of condition numbers and pseudospectra
Marko Lindner, Dennis Schmeckpeper
The stability of an approximating sequence for an operator usually requires, besides invertibility of , the invertibility of further operators, say , th…
math.FA2022
A note on Hausdorff-convergence of pseudospectra
Marko Lindner, Dennis Schmeckpeper
For 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…