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Belyi Pairs and Fried Families
G. B. Shabat Russian State University for the Humanities, Miusskaya pl. 6, Moscow, 125993 Russia
Abstract:
For the rational functions on algebraic curves, the number of critical values typical for the Belyi functions is three. This number is replaced by four. The emerging objects, unlike the rigid Belyi pairs, can be deformed; they constitute one-parameter families. The main properties of the corresponding curves in the moduli spaces are established, and the relation of these curves to the Belyi pairs is considered. The case of the clean Belyi pairs of genus $2$ of minimal degree $8$ is analyzed.
Keywords:
Belyi pairs, dessins d'enfants, Fried families, moduli spaces of curves, Galois theory.
Received: May 29, 2019 Revised: June 20, 2019 Accepted: September 1, 2019
Citation:
G. B. Shabat, “Belyi Pairs and Fried Families”, Algebra, number theory, and algebraic geometry, Collected papers. Dedicated to the memory of Academician Igor Rostislavovich Shafarevich, Trudy Mat. Inst. Steklova, 307, Steklov Mathematical Institute of RAS, Moscow, 2019, 306–318; Proc. Steklov Inst. Math., 307 (2019), 281–293
Linking options:
https://www.mathnet.ru/eng/tm4039https://doi.org/10.4213/tm4039 https://www.mathnet.ru/eng/tm/v307/p306
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