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Composition operators and Rational Inner Functions on the bidisc

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arxiv 2412.16593 v3 pith:23OPK4XQ submitted 2024-12-21 math.CV

Composition operators and Rational Inner Functions on the bidisc

classification math.CV
keywords compositioninnermathbbrationalfunctionsbergmanbidiscoperator
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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In the present article, composition operators induced by Rational Inner Functions on the bidisc $\mathbb{D}^2$ are studied, acting on the weighted Bergman space $A^2_{\beta}(\mathbb{D}^2).$ We prove that under mild conditions that Rational Inner Functions with one singularity on $\mathbb{T}^2$ induce unbounded composition operator on $A^2(\mathbb{D}^2).$ We also prove that under the condition of stability of the polynomial inducing the Rational Inner Function, the composition operator is bounded between two different Bergman spaces.

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Cited by 1 Pith paper

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  1. Compactness of composition operator on weighted Bergman spaces of the polydisc

    math.FA 2026-06 unverdicted novelty 4.0

    Proves compactness criterion for composition operators on weighted Bergman spaces of the polydisc using only the distinguished boundary, with geometric characterizations for beta > d-3.