Michael Frank

activity

20092026

collaborators

3 papers

math.FA2026

Extremal representations of functions of matrices and applications to multivariate prediction

Michael Frank, Lutz Klotz, Andreas Lasarow

Motivated by two seminal results of multivariate prediction theory by Helson and Lowdenslager and by Wiener and Masani we prove extremal representations of functions of matrices an…

math.OA2025

C-submodule preserving module mappings on Hilbert C-modules

Michael Frank

Let $A$ be a (non-unital, in general) C*-algebra with center $Z (M (A))$ of its multiplier algebra, and let ${X, ⟨ ., . ⟩}$ be a full Hilbert $A$ -module. Then any bije…

math.OA2009

Hilbert C*-modules from group actions: beyond the finite orbits case

M. Frank, V. Manuilov, E. Troitsky

Continuous actions of topological groups on compact Hausdorff spaces $X$ are investigated which induce almost periodic functions in the corresponding commutative C*-algebra. The un…

Extremal representations of functions of matrices and applications to multivariate prediction

C*-submodule preserving module mappings on Hilbert C*-modules

Hilbert C*-modules from group actions: beyond the finite orbits case

C-submodule preserving module mappings on Hilbert C-modules