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We investigate the size of fixed point sets of automorphisms of bounded domains in $\mathbb{C}^n$. In one complex variable, a nontrivial automorphism has at most two fixed points, but in higher dimensions fixed point sets need not be…

Complex Variables · Mathematics 2026-04-10 Bharathi Thiruvengadam , Jaikrishnan Janardhanan

In this paper, we introduce the concept of stable automorphic forms for semisimple algebraic groups and use the stability of automorphic forms to study the geometry of infinite dimensional arithmetic quotients.

Algebraic Geometry · Mathematics 2025-09-15 Jae-Hyun Yang

For noncompact semisimple Lie groups $G$ we study the dynamics of the actions of their discrete subgroups $\Gamma<G$ on the associated partial flag manifolds $G/P$. Our study is based on the observation that they exhibit also in higher rank…

Metric Geometry · Mathematics 2018-03-16 Michael Kapovich , Bernhard Leeb , Joan Porti

Inverse semigroups are a class of semigroups whose structure induces a compatible partial order. This partial order is examined so as to establish mirror properties between an inverse semigroup and the semilattice of its idempotent…

Rings and Algebras · Mathematics 2013-01-25 Paul Poncet

We give an explicit description of smoothly bounded Reinhardt domains with noncompact automorphism groups. In particular, this description confirms a special case of a conjecture of Greene/Krantz.

Complex Variables · Mathematics 2008-02-03 Siqi Fu , Alexander V. Isaev , Steven G. Krantz

We study spectral behavior of the complex Laplacian on forms with values in the $k^{\text{th}}$ tensor power of a holomorphic line bundle over a smoothly bounded domain with degenerated boundary in a complex manifold. In particular, we…

Complex Variables · Mathematics 2007-12-10 Siqi Fu , Howard Jacobowitz

Let $K$ be a field and $f:\mathbb{P}^N \to \mathbb{P}^N$ a morphism. There is a natural conjugation action on the space of such morphisms by elements of the projective linear group $\text{PGL}_{N+1}$. The group of automorphisms, or…

Number Theory · Mathematics 2016-04-12 Joao Alberto de Faria , Benjamin Hutz

In the paper we study the geometry of semitube domains in $\mathbb C^2$. In particular, we extend the result of Burgu\'es and Dwilewicz for semitube domains dropping out the smoothness assumption. We also prove various properties of…

Complex Variables · Mathematics 2015-04-16 Łukasz Kosiński , Tomasz Warszawski , Włodzimierz Zwonek

We discuss $C^0$-continuous homogeneous quasi-morphisms on the identity component of the group of compactly supported symplectomorphisms of a symplectic manifold. Such quasi-morphisms extend to the $C^0$-closure of this group inside the…

Dynamical Systems · Mathematics 2012-05-25 Michael Entov , Leonid Polterovich , Pierre Py

The purpose of this article is to investigate the boundary behaviour of the Kobayashi--Fuks metric and several associated invariants on strictly pseudoconvex domains in the paradigm of scaling. This approach allows us to examine more…

Complex Variables · Mathematics 2025-01-23 Anjali Bhatnagar

In this paper, we study group equations with occurrences of automorphisms. We describe equational domains in this class of equations. Moreover, we solve a number of open problem posed in universal algebraic geometry.

Algebraic Geometry · Mathematics 2020-03-26 Artem N. Shevlyakov

Generically an almost complex structure has no symmetries at all, but there exist symmetric structures. In this paper we describe how to guarantee that the pseudogroup of local symmetries is small (finite-dimensional). It will be indicated…

Differential Geometry · Mathematics 2013-11-19 Boris Kruglikov

A flag domain of a real from $G_0$ of a complex semismiple Lie group $G$ is an open $G_0$-orbit $D$ in a (compact) $G$-flag manifold. In the usual way one reduces to the case where $G_0$ is simple. It is known that if $D$ possesses…

Complex Variables · Mathematics 2018-07-20 T. Hayama , A. Huckleberry , Q. Latif

We survey recent work on the dynamics of the outer automorphism group of a word hyperbolic group on spaces of (conjugacy classes of) representations ofthe group into a semi-simple Lie group G. All these results are motivated by the fact…

Geometric Topology · Mathematics 2013-06-26 Richard D. Canary

We study the evolution, under convex Hamiltonian flows on cotangent bundles of compact manifolds, of certain distinguished subsets of the phase space. These subsets are generalizations of Lagrangian graphs, we call them pseudographs. They…

Dynamical Systems · Mathematics 2008-07-10 Patrick Bernard

We introduce a notion of autonomous dynamical systems and apply it to prove rigidity of partially hyperbolic diffeomorphisms on closed compact three-manifolds under some smoothness hypothesis of their associated framing.

Dynamical Systems · Mathematics 2025-08-20 Souheib Allout , Kambiz Moghaddamfar

We study actions of discrete subgroups $\Gamma$ of semi-simple Lie groups $G$ on associated oriented flag manifolds. These are quotients $G/P$, where the subgroup $P$ lies between a parabolic subgroup and its identity component. For Anosov…

Differential Geometry · Mathematics 2018-06-13 Florian Stecker , Nicolaus Treib

We characterize in terms of characteristic sequences the semigroups corresponding to branches at infinity of plane affine curves $\Gamma$ for which there exists a polynomial automorphism mapping $\Gamma$ onto the axis $x=0$.

Algebraic Geometry · Mathematics 2019-10-03 Evelia R. García Barroso , Janusz Gwoździewicz , Arkadiusz Płoski

We construct several new examples of homogeneous domains in complex space that do not have bounded realisations. They are equivalent to tubes over affinely homogeneous domains in real space and have a real-analytic everywhere Levi…

Complex Variables · Mathematics 2007-05-23 Michael Eastwood , Alexander Isaev

The affine scaling method has been a typical approach to study complex domains with noncompact automorphism group. In this article, we will introduce an alternative approach, so called, the method of potential scaling to construct a certain…

Complex Variables · Mathematics 2020-11-06 Kang-Hyurk Lee