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math.FA2022
Composition operators and generalized primes
Athanasios Kouroupis
We study composition operators on the Hardy space of Dirichlet series with square summable coefficients. Our main result is a necessary condition, in terms of a Nev…
math.FA2022★ 8 cited
Composition operators on weighted Hilbert spaces of Dirichlet series
Athanasios Kouroupis, Karl-Mikael Perfekt
We study composition operators of characteristic zero on weighted Hilbert spaces of Dirichlet series. For this purpose we demonstrate the existence of weighted mean counting functi…