Michael Frank

collaborators

2 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.OA2026

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…

Extremal representations of functions of matrices and applications to multivariate prediction

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

C-submodule preserving module mappings on Hilbert C-modules