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.FA2026
Remarks on infimum and maximal lower bounds of a set of bounded self-adjoint operators
Matthias Günther, Lutz Klotz
The notions of infimum and maximal lower bounds of a set of bounded self-adjoint operators were mainly studied for a set of two elements. The present pa…