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JOURNALS // Algebra i Analiz // Archive

Algebra i Analiz, 2008 Volume 20, Issue 4, Pages 1–26 (Mi aa520)

This article is cited in 2 papers

Research Papers

Admissibility of majorants in certain model subspaces: necessary conditions

Yu. S. Belov

St. Petersburg State University, Department of Mathematics and Mechanics

Abstract: A nonnegative function $\omega$ on $\mathbb{R}$ is called an admissible majorant for an inner function $\Theta$ if there is a nonzero function $f\in H^2\ominus\Theta H^2$ such that $|f|\le\omega$. Some conditions necessary for admissibility are presented in the case where $\Theta$ is meromorphic.

Keywords: Blaschke product, model subspace, admissible majorant, Beurling–Malliavin theorem.

MSC: 30D50, 30D55, 30D20

Received: 20.02.2008


 English version:
St. Petersburg Mathematical Journal, 2009, 20:4, 507–525

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© Steklov Math. Inst. of RAS, 2024