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Interpolating Blaschke products generate \(H^ \infty\)

open access: yes, 1996
A Blaschke product \(B(z)\) with zeros \(\{z_n\}\) is called an interpolating Blaschke product if there exists a number \(\delta_B>0\) such that, for each \(n\), \((1-|z |^2) B'(z)\geq \delta_B\). As the title of this paper indicates, the authors prove that the space \(H^\infty\) is the closed linear span of the collection of all interpolating Blaschke
Garnett, John, Nicolau, Artur
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