Can I read Power-series summability methods in de Branges-Rovnyak spaces on EtoBox?

Power-series summability methods in de Branges-Rovnyak spaces by Mashreghi, Javad; Parisé, Pierre-Olivier; Ransford, Thomas is a scholarly article available to read on EtoBox.

What is Power-series summability methods in de Branges-Rovnyak spaces about?

We show that there exists a de Branges-Rovnyak space $\mathcal{H}(b)$ on the unit disk containing a function $f$ with the following property: even though $f$ can be approximated by polynomials in $\mathcal{H}(b)$, neither the Taylor partial sums of $f$ nor their Ces\`aro, Abel, Borel or logarithmic means converge to $f$ in $\mathcal{H}(b)$. A key tool is a new abstract result showing that, if one regular summability method includes another for scalar sequences, then it automatically does so for certain Banach-space-valued sequences too.

Author

Mashreghi, Javad; Parisé, Pierre-Olivier; Ransford, Thomas

Published

2021

Language

EN