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JOURNALS // Matematicheskii Sbornik // Archive

Mat. Sb., 2025 Volume 216, Number 4, Pages 44–66 (Mi sm10118)

Sharp univalence and sharp univalent covering domains for the class of holomorphic self-maps of a disc with two fixed boundary points

O. S. Kudryavtsevaabc, A. P. Solodovab

a Lomonosov Moscow State University, Moscow, Russia
b Moscow Center of Fundamental and Applied Mathematics, Moscow, Russia
c Volgograd State Technical University, Volgograd, Russia

Abstract: The class of holomorphic self-maps of the unit disc with two fixed boundary points, one of which is attracting, is under consideration. Maximal univalence and univalent covering domains are found for the functions in this class that satisfy a bound on the value of the angular derivative at the repelling boundary point.
Bibliography: 17 titles.

Keywords: holomorphic map, fixed points, angular derivative, univalence domain, univalent covering domain.

MSC: 30C55

Received: 13.05.2024 and 19.11.2024

DOI: 10.4213/sm10118


 English version:
Sbornik: Mathematics, 2025, 216:4, 494–514


© Steklov Math. Inst. of RAS, 2025