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Let $\mathrm{Mod}(S_g)$ be the mapping class group of the closed orientable surface $S_g$ of genus $g\geq 2$. In this paper, we derive necessary and sufficient conditions under which two torsion elements in $\mathrm{Mod}(S_g)$ will have…

Geometric Topology · Mathematics 2021-12-20 Neeraj K. Dhanwani , Kashyap Rajeevsarathy , Apeksha Sanghi

Let $\mathrm{Mod}(S_g)$ be the mapping class group of the closed orientable surface of genus $g \geq 2$. In this article, we derive necessary and sufficient conditions under which two torsion elements in $\mathrm{Mod}(S_g)$ will have…

Geometric Topology · Mathematics 2023-10-11 Rajesh Dey , Kashyap Rajeevsarathy

Let $S_g$ be the closed orientable surface of genus $g \geq 2$, and let $\mathrm{Mod}(S_g)$ be the mapping class group of $S_g$. Let $A_n$ denote the alternating group on $n$ letters. We derive necessary and sufficient conditions under…

Geometric Topology · Mathematics 2025-09-03 Apeksha Sanghi , Kashyap Rajeevsarathy , Rajesh Dey

For $g\geq 2$, let $\text{Mod}(S_g)$ be the mapping class group of the closed orientable surface $S_g$ of genus $g$. In this paper, we provide necessary and sufficient conditions for the existence of infinite metacyclic subgroups of…

Geometric Topology · Mathematics 2023-09-11 Pankaj Kapari , Kashyap Rajeevsarathy , Apeksha Sanghi

Let $\text{Mod}(S_g)$ be the mapping class group of the closed orientable surface $S_g$ of genus $g\geq 2$. In this paper, we derive necessary and sufficient conditions for two finite-order mapping classes to have commuting conjugates in…

Geometric Topology · Mathematics 2019-02-01 Neeraj K. Dhanwani , Kashyap Rajeevsarathy

For $g\geq 2$, let $\mathrm{Mod}(S_g)$ be the mapping class group of the closed orientable surface $S_g$ of genus $g$. In this paper, we obtain necessary and sufficient conditions under which a given pseudo-periodic mapping class can be a…

Geometric Topology · Mathematics 2023-09-11 Pankaj Kapari , Kashyap Rajeevsarathy

Let $ \text{Mod}(S_g)$ denote the mapping class group of the closed orientable surface $S_g$ of genus $g\geq 2$, and let $f\in \text{Mod}(S_g)$ be of finite order. We give an inductive procedure to construct an explicit hyperbolic structure…

Geometric Topology · Mathematics 2017-10-24 Shiv Parsad , Kashyap Rajeevsarathy , Bidyut Sanki

Let $\mathrm{Mod}(S_g)$ denote the mapping class group of the closed orientable surface $S_g$ of genus $g\geq 2$. Given a finite subgroup $H$ of $\mathrm{Mod}(S_g)$, let $\mathrm{Fix}(H)$ denote the set of fixed points induced by the action…

Geometric Topology · Mathematics 2021-12-20 Atreyee Bhattacharya , Shiv Parsad , Kashyap Rajeevsarathy

Let $\mathrm{Mod}(S_g)$ be the mapping class group of the closed orientable surface of genus $g \geq 1$, and let $\mathrm{LMod}_{p}(X)$ be the liftable mapping class group associated with a finite-sheeted branched cover $p:S \to X$, where…

Geometric Topology · Mathematics 2025-04-30 Soumya Dey , Neeraj K. Dhanwani , Harsh Patil , Kashyap Rajeevsarathy

Let $\mathrm{Mod}(S_g)$ be the mapping class group of the closed orientable surface of genus $g \geq 1$. For $k \geq 2$, we consider the standard $k$-sheeted regular cover $p_k: S_{k(g-1)+1} \to S_g$, and analyze the liftable mapping class…

Geometric Topology · Mathematics 2021-11-01 Nikita Agarwal , Soumya Dey , Neeraj K. Dhanwani , Kashyap Rajeevsarathy

Let $N_g$ be a closed, connected, nonorientable surface of genus $g$. We prove that for $g \ge 13$, the mapping class group $\text{Mod}(N_g)$ can be generated by exactly two elements. This improves the previously known bound of $g \ge 19$.

Geometric Topology · Mathematics 2026-05-14 Berkay Aybak , Hasan Ozden

We prove the congruence subgroup property for the centralizer of a finite subgroup $G$ in the mapping class group of a hyperbolic oriented and connected surface of finite topological type $S$ such that the genus of the quotient surface…

Geometric Topology · Mathematics 2026-01-15 Marco Boggi

The mapping class group $\mathrm{Mod}_{g, 1}$ of a surface with one marked point can be identified with an index two subgroup of $\mathrm{Aut}(\pi_1 \Sigma_g)$. For a surface of genus $g \geq 2$, we show that any action of $\mathrm{Mod}_{g,…

Geometric Topology · Mathematics 2020-10-07 Kathryn Mann , Maxime Wolff

For $g\geq 2$, let $\mathrm{Mod}(S_g)$ be the mapping class group of closed orientable surface $S_g$ of genus $g$. In this paper, we derive a finite generating set for the liftable mapping class groups corresponding to finite-sheeted…

Geometric Topology · Mathematics 2025-09-24 Pankaj Kapari , Kashyap Rajeevsarathy , Apeksha Sanghi

In [Tohoku Math. J. 62 (2010), 45--53] the second author showed that, except for a few cases, the order $N$ of a cyclic group of self-homeomorphisms of a closed orientable topological surface $S_g$ of genus $g \geq 2$ determines the group…

Geometric Topology · Mathematics 2017-02-09 Grzegorz Gromadzki , Susumu Hirose , Błażej Szepietowski

This chapter provides a comprehensive survey of foundational results and recent advances concerning minimal generating sets for the mapping class group of a nonorientable surface, $\mathrm{Mod}(N_{g})$, and its index-two twist subgroup,…

Geometric Topology · Mathematics 2025-11-24 Tulin Altunoz , Mehmetcik Pamuk , Oguz Yildiz

We describe the topological behavior of the conjugacy action of the mapping class group of an orientable infinite-type surface $\Sigma$ on itself. Our main results are: (1) All conjugacy classes of $MCG(\Sigma)$ are meager for every…

Let $S_g$ be the closed oriented surface of genus g and let $\text{Mod}(S_g)$ be the mapping class group. When the genus is at least 3, $\text{Mod}(S_g)$ can be generated by torsion elements. We prove the follow results. For $g \geq 4$,…

Geometric Topology · Mathematics 2018-02-27 Xiaoming Du

The mapping class group ${\Gamma}_g^ 1$ of a closed orientable surface of genus $g \geq 1$ with one marked point can be identified, by the Nielsen action, with a subgroup of the group of orientation preserving homeomorphims of the circle.…

Geometric Topology · Mathematics 2024-09-12 Solomon Jekel , Rita Jiménez Rolland

We prove that, for $g\geq19$ the mapping class group of a nonorientable surface of genus $g$, $\textrm{Mod}(N_g)$, can be generated by two elements, one of which is of order $g$. We also prove that for $g\geq26$, $\textrm{Mod}(N_g)$ can be…

Geometric Topology · Mathematics 2021-04-23 Tulin Altunoz , Mehmetcik Pamuk , Oguz Yildiz
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