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Jordan domains with a rectifiable arc in their boundary

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Abstract

We show that if an open arc J of the boundary of a Jordan domain \({\varOmega }\) is rectifiable, then the derivative \(\varPhi '\) of the Riemann map \(\varPhi :D\;\rightarrow \;{\varOmega }\) from the open unit disk D onto \({\varOmega }\) behaves as an \(H^1\) function when we approach the arc \(\varPhi ^{-1}(J')\), where \(J'\) is any compact subarc of J.

Résumé

Nous démontrons que si un arc ouvert J de la frontière d’ un domaine de Jordan \(\varOmega \) est rectifiable, alors la dérivée \(\varPhi ^{\prime }\) de la fonction de Riemann \(\varPhi \) entre le disque unité ouvert D sur \(\varOmega \) se comporte comme une fonction de classe de Hardy \(H^1\), quand on approche le sous-ensemble \(\varPhi ^{-1}(J^{\prime })\)\(J^{\prime }\) est un sous-ensemble compact de J.

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Acknowledgements

We would like to thank professor E. Katsoprinakis for his interest in this work.

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Correspondence to Vasiliki Liontou.

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The original version of this article was revised to correct the second author name.

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Liontou, V., Nestoridis, V. Jordan domains with a rectifiable arc in their boundary. Ann. Math. Québec 45, 45–50 (2021). https://doi.org/10.1007/s40316-019-00119-0

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