The Fatou–Bieberbach approximation conjecture for restrictions of univalent maps

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Let f∈Sf\in{\mathcal{S}} be normalized and univalent on Bn⊆Cn{\mathbb{B}^n}\subseteq{\mathbb{C}^n}. For r∈(0,1)r\in(0,1), write fr(z)=r−1f(rz)f_r(z)=r^{-1}f(rz). A Fatou–Bieberbach domain is a domain biholomorphic to Cn{\mathbb{C}^n}, and a pair (U,Ω)(U,\Omega) is Runge when UU is Runge in Ω\Omega.

Fatou–Bieberbach approximation conjecture. For every r∈(0,1)r\in(0,1), there exists a domain Ωr⊆Cn\Omega_r\subseteq{\mathbb{C}^n} biholomorphic to Cn{\mathbb{C}^n} such that

f(rBn)⊆Ωrf(r{\mathbb{B}^n})\subseteq\Omega_r

and (f(rBn),Ωr)(f(r{\mathbb{B}^n}),\Omega_r) is a Runge pair. This is given as a weaker formulation related to the preceding Fatou–Bieberbach conjectures; its status is not resolved in the supplied text.

References

Primary source

Matteo Fiacchi, “The embedding conjecture and the approximation conjecture in higher dimension”, arXiv:1710.02087 (2017).

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