Cyclicity conjecture for singular inner functions in analytic weighted spaces

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Let GG and w∈L1(T)w\in\mathcal{L}^1(\mathbb{T}) be as in the core-carrier conjecture, let μ\mu have the form, and let core⁡(w)\operatorname{core}(w) denote the core of ww. For a singular measure ν\nu, let SνS_\nu be the associated singular inner function. Cyclicity conjecture. In this setting, SνS_\nu is cyclic in the space of analytic functions P2(μ)\mathcal{P}^2(\mu) if and only if

ν(core⁡(w))=0.\nu\bigl(\operatorname{core}(w)\bigr)=0.

This is proposed as a strong version combining the cited cyclicity result with the paper's cyclicity theorem; the source gives no evidence that it has been resolved.

References

Primary source

Bartosz Malman, “Shift operators, Cauchy integrals and approximations”, arXiv:2308.06495 (2023).

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