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math.FA2024
Königs maps and commutants of composition operators on the Hardy-Hilbert space of Dirichlet series
Frédéric Bayart, Xingxing Yao
Let be a holomorphic map which is a symbol of a bounded composition operator acting on the Hardy-Hilbert space of Dirichlet series. We find a Königs map for . We then…
math.CV2024
On universality of general Dirichlet series
Frédéric Bayart, Athanasios Kouroupis
In the present work, we establish sufficient conditions for a Dirichlet series induced by general frequencies to be universal with respect to vertical translations. Our results can…