Cryptohermitian picture of scattering using quasilocal metric operators.
C-semigroups on Banach spaces and functional inequalities
C*-seminorms on partial *-algebras: an overview
The main facts about unbounded C*-seminorms on partial *-algebras are reviewed and the link with the representation theory is discussed. In particular, starting from the more familiar case of *-algebras, we examine C*-seminorms that are defined from suitable families of positive linear or sesquilinear forms, mimicking the construction of the Gelfand seminorm for Banach *-algebras. The admissibility of these forms in terms of the (unbounded) C*-seminorms they generate is characterized.
Cutting the loss of derivatives for solvability under condition
For a principal type pseudodifferential operator, we prove that condition implies local solvability with a loss of 3/2 derivatives. We use many elements of Dencker’s paper on the proof of the Nirenberg-Treves conjecture and we provide some improvements of the key energy estimates which allows us to cut the loss of derivatives from for any (Dencker’s most recent result) to 3/2 (the present paper). It is already known that condition doesnotimply local solvability with a loss of 1 derivative,...
Cyclic behavior of linear fractional composition operators.
Cyclic Blaschke products for composition operators.
Cyclic cocycles, renormalization and eta-invariants.
Cyclic space isomorphism of unitary operators
We introduce a new equivalence relation between unitary operators on separable Hilbert spaces and discuss a possibility to have in each equivalence class a measure-preserving transformation.
Cyclic vectors for operator algebras
Cyclically compact operators in Banach spaces.
Cyclicity of the adjoint of weighted composition operators on the Hilbert space of analytic functions
In this paper, we discuss the hypercyclicity, supercyclicity and cyclicity of the adjoint of a weighted composition operator on a Hilbert space of analytic functions.
-symmetric operators: comments and some open problems.
Darstellung von Banach-Verbänden und Sätze vom Korovkin-Typ.
Das Eigenwerttheorem von Krasnoselski für -kondensierende Abbildungen
Das Lomonosov-Lemma für topologische Vektorräume.
Das modifizierte Newton-Verfahren in verallgemeinerten Banach-Räumen.
Das Randwertproblem für eine Klasse singulärer gewöhnlicher Differentialausdrücke.
Das Randwertproblem für eine Klasse singulärer gewöhnlicher Differentialausdrücke. (Short Communication).
Das Spektrum von Verbandsoperatoren in Banachverbänden.
Das verallgemeinerte Inverse eines linearen Operators in Vektorräumen mit nicht ausgearteter Hermitescher Metrik über einenm kommutativen Körper.