Index theory for multivariable Wiener-Hopf operators.
Inessential operators and incomparability of Banach spaces.
We obtain several characterizations for the classes of Riesz and inessential operators, and apply them to extend the family of Banach spaces for which the essential incomparability class is known, solving partially a problem posed in [6].
Invariance of the Fredholm radius of the Neumann operator
Inversion von Fredholmfunktionen bei stetiger und holomorpher Abhängigkeit von Parametern.
Invertibility characterization of Wiener-Hopf plus Hankel operators via odd asymmetric factorizations.