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In this paper, we introduce a birationally admissible stratification on the Deligne-Mumford stack of stable minimal models (e.g., the KSBA moduli stack), such that the universal family over each stratum admits a simple normal crossing log…

Algebraic Geometry · Mathematics 2025-06-24 Junchao Shentu

A proof that the separating curve complex of the closed genus two surface has a quasi-distance formula and is delta hyperbolic using tools of Masur and Schleimer. This answers in the affirmative a Conjecture of Schleimer.

Geometric Topology · Mathematics 2015-02-12 Harold Mark Sultan

In this paper, we discuss the capable and isoclinic properties of the tensor square in the context of multiplicative Lie algebras. We also developed the concept of isoclinic extensions and proved several results for multiplicative Lie…

Group Theory · Mathematics 2024-06-05 Dev Karan Singh , Amit Kumar , Sumit Kumar Upadhyay , Shiv Datt Kumar

In this work we state a version of the double extension for homogeneous quadratic Lie super algebras that includes even and odd cases. We prove that any indecomposable, non-simple and homogeneous quadratic Lie super algebra is obtained by…

Rings and Algebras · Mathematics 2024-11-14 R. García-Delgado

We consider strong symplectic fillings of the unit cotangent bundle of a hyperbolic surface, equipped with its canonical contact structure. We show that every finitely presentable group can be realised as the fundamental group of such a…

Symplectic Geometry · Mathematics 2025-12-17 Hansjörg Geiges , Kai Zehmisch

Let $K$ be a field of characteristic $p \neq 2$, and let $f(x)$ be a sextic polynomial irreducible over $K$ with no repeated roots, whose Galois group is isomorphic to $\A_5$. If the jacobian $J(C)$ of the hyperelliptic curve $C:y^2=f(x)$…

Algebraic Geometry · Mathematics 2007-05-23 Arsen Elkin

The paper is a contribution to the conjecture of Kobayashi that the complement of a generic curve in the projective plane is hyperbolic, provided the degree is at least five. Previously the authors treated the cases of two quadrics and a…

alg-geom · Mathematics 2014-12-01 Gerd Dethloff , Georg Schumacher , Pit-Mann Wong

We provide explicit formulas of non-recursive type for the linearizing transformations of a non-resonant analytic germ of diffeomorphism at a fixed point or a non-resonant analytic germ of vector field at a singular point, in any complex…

Dynamical Systems · Mathematics 2025-07-18 Frédéric Fauvet , Frédéric Menous , David Sauzin

Let G be a group admitting a non-elementary acylindrical action on a Gromov hyperbolic space (for example, a non-elementary relatively hyperbolic group, or the mapping class group of a closed hyperbolic surface, or Out(F_n) for n>1). We…

Group Theory · Mathematics 2015-06-12 R. Frigerio , M. B. Pozzetti , A. Sisto

We study the possible dimensions that the groups of holomorphic automorphisms of hyperbolic Reinhardt domains can have. We are particularly interested in the problem of characterizing Reinhardt domains with automorphism group of prescribed…

Complex Variables · Mathematics 2007-05-23 James A. Gifford , Alexander V. Isaev , Steven G. Krantz

The generalized Lax conjecture asserts that each hyperbolicity cone is a linear slice of the cone of positive semidefinite matrices. We prove the conjecture for a multivariate generalization of the matching polynomial. This is further…

Combinatorics · Mathematics 2016-11-21 Nima Amini

This is an expository paper. It is well known that a linear transformation can be defined to have any desired action on a basis. From this fact, one can show that every group homomorphism from Z^k to R^d extends to a homomorphism from R^k…

History and Overview · Mathematics 2007-12-17 Dave Witte Morris

The canonical polynomial is an important output of the multivariable topological Poincar\'e series associated with a normal surface singularity. It can be considered as a multivariable polynomial generalization of the Seiberg--Witten…

Geometric Topology · Mathematics 2024-10-18 Tamás László

In this article we describe the centres of all Dyer groups. We also give a complete classification of when a Dyer group $D(\Gamma)$ is hyperbolic or acylindricality hyperbolic, with conditions that can easily be read on the Dyer graph…

Group Theory · Mathematics 2024-10-31 Mireille Soergel , Nicolas Vaskou

We prove a homogenization theorem for quadratic convolution energies defined in perforated domains. The corresponding limit is a Dirichlet-type quadratic energy, whose integrand is defined by a non-local cell-problem formula. The proof…

Analysis of PDEs · Mathematics 2025-01-16 Andrea Braides , Andrey Piatnitski

The present work studies deeply quadratic symplectic Lie superalgebras, obtaining, in particular, that they are all nilpotent. Consequently, we provide classifications in low dimensions and identify the double extensions that maintain…

Representation Theory · Mathematics 2024-01-26 Elisabete Barreiro , Saïd Benayadi , Rosa M. Navarro , José M. Sánchez

It is shown that for non-hyperbolic real quadratic polynomials topological and quasisymmetric conjugacy classes are the same. By quasiconformal rigidity, each class has only one representative in the quadratic family, which proves that…

Dynamical Systems · Mathematics 2009-09-25 Grzegorz Swiatek

We call a central extension bounded if its Euler class is represented by a bounded cocycle. We prove that a bounded central extension of a hierarchically hyperbolic group (HHG) is still a HHG; conversely if a central extension is a HHG,…

Group Theory · Mathematics 2026-01-07 Francesco Fournier-Facio , Giorgio Mangioni , Alessandro Sisto

We formulate a refined theory of linear systems, using the methods of a previous paper, "A Theory of Branches for Algebraic Curves", and use it to give a geometric interpretation of the genus of an algebraic curve. Using principles of…

Algebraic Geometry · Mathematics 2010-03-31 Tristram de Piro

Let $\Gamma$ be a finitely generated group which is hyperbolic relative to a finite family $\{H_1,...,H_n\}$ of subgroups. We prove that $\Gamma$ is uniformly embeddable in a Hilbert space if and only if each subgroup $H_i$ is uniformly…

Group Theory · Mathematics 2007-05-23 Marius Dadarlat , Erik Guentner