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math.FA2021
Power-series summability methods in de Branges-Rovnyak spaces
Javad Mashreghi, Pierre-Olivier Parisé, Thomas Ransford
We show that there exists a de Branges-Rovnyak space on the unit disk containing a function with the following property: even though can be approximated by…
math.FA2020
Failure of Approximation of Odd Functions by Odd Polynomials
Javad Mashreghi, Pierre-Olivier Parisé, Thomas Ransford
We construct a Hilbert holomorphic function space on the unit disk such that the polynomials are dense in , but the odd polynomials are not dense in the odd functions in …