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JOURNALS // Funktsional'nyi Analiz i ego Prilozheniya // Archive

Funktsional. Anal. i Prilozhen., 2025 Volume 59, Issue 1, Pages 89–106 (Mi faa4081)

Isoperiodic foliation on the moduli spaces of real-normalized differentials with a single pole

Marina Nenashevaab

a Skolkovo Institute of Science and Technology, Moscow, Russia
b National Research University "Higher School of Economics", Moscow

Abstract: Meromorphic differentials on Riemann surfaces are said to be real-normalized if all their periods are real. Moduli spaces of real-normalized differentials on Riemann surfaces of given genus with prescribed orders of their poles and residues admit a stratification by the orders of zeroes of the differentials. Subsets of real-normalized differentials with a fixed polarized module of periods compose isoperiodic subspaces, which also admit this stratification. In this work, we prove connectedness of the principal stratum for the isoperiodic subspaces in the space of real-normalized differentials with a single pole of order two when all the periods are incommesurable.

Keywords: moduli space of algebraic curves, real-normalized differential, isoperiodic foliation, arc diagram.

MSC: Primary 30F30, 32G15; Secondary 32G15

Received: 22.12.2022
Revised: 17.06.2024
Accepted: 22.07.2024

DOI: 10.4213/faa4081


 English version:
Functional Analysis and Its Applications, 2025, 59:1, 65–78

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© Steklov Math. Inst. of RAS, 2026