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Topological properties of the jacobian curve ${\mathcal J}_{\mathcal{F},\mathcal{G}}$ of two foliations $\mathcal{F}$ and $\mathcal{G}$ are described in terms of invariants associated to the foliations. The main result gives a decomposition…

Dynamical Systems · Mathematics 2023-06-21 Nuria Corral

Let $f:M\to M$ be a dynamically coherent partially hyperbolic diffeomorphism whose center foliation has all its leaves compact. We prove that if the unstable bundle of $f$ is one-dimensional, then the volume of center leaves must be bounded…

Dynamical Systems · Mathematics 2019-01-01 Verónica De Martino , Santiago Martinchich

We classify the irreducible components of the space of foliations on Fano 3-folds with rank one Picard group. As a corollary we obtain a classification of holomorphic Poisson structures on the same class of 3-folds.

Algebraic Geometry · Mathematics 2012-12-20 Frank Loray , Jorge Vitorio Pereira , Frederic Touzet

This paper is devoted to prove that if an Alexandrov space of curvature not less than $\kappa$ with a codimension one extremal subset which admits an isometric involution with respect to the induced length metric, then the metric space…

Metric Geometry · Mathematics 2016-06-09 Ayato Mitsuishi

In this paper we study singular riemannian foliations that have sections,i.e., totally geodesic complete immersed submanifolds that meet each leaf orthogonally and whose dimensions are the codimensions of the regular leaves. We prove here…

Differential Geometry · Mathematics 2007-05-23 Marcos M. Alexandrino

We describe transversely oriented foliations of codimension one on closed manifolds that admit simple foliated flows.

Geometric Topology · Mathematics 2019-06-18 Jesús A. Álvarez López , Yuri A. Kordyukov , Eric Leichtnam

We show that for a smooth manifold equipped with a singular Riemannian foliation, if the foliated metric has positive sectional curvature, and there exists a pre-section, that is a proper submanifold retaining all the transverse geometric…

Differential Geometry · Mathematics 2023-06-23 Diego Corro , Adam Moreno

The paper considers a class of Lagrangian surfaces in $\mathbb C^2$ with isolated singularities of the unfolded Whitney umbrella type. We prove that generically such a surface is locally polynomially convex near a singular point of this…

Complex Variables · Mathematics 2012-08-24 Rasul Shafikov , Alexandre Sukhov

We show that in any sequence of a general type MMP, the minimal log discrepancy of singularities takes at most finitely many values, and the fibers of all the extremal contractions and flips belong to a bounded family. A key ingredient in…

Algebraic Geometry · Mathematics 2025-09-03 Jingjun Han , Lu Qi , Ziquan Zhuang

Let $G$ be a countable branch group of automorphisms of a spherically homogeneous rooted tree. Under some assumption on finitarity of $G$, we construct, for each sequence $\omega\in\{0,1\}^\Bbb N$, an irreducible unitary representation…

Dynamical Systems · Mathematics 2025-03-07 Alexandre I. Danilenko , Artem Dudko

In this paper we show that the singular locus of a Legendrian foliation as defined in [Hua13] is a compact submanifold whose connected components are of codimension at most two. As a consequence, given any closed $(n+1)$-dimensional…

Symplectic Geometry · Mathematics 2014-11-24 Yang Huang

In this survey paper, we take the viewpoint of polar invariants to the local and global study of non-dicritical holomorphic foliations in dimension two and their invariant curves. It appears a characterization of second type foliations and…

Dynamical Systems · Mathematics 2015-08-28 Felipe Cano , Nuria Corral , Rogério Mol

We prove the local motivic monodromy conjecture for singularities that are nondegenerate with respect to a simplicial Newton polyhedron. It follows that all poles of the local topological zeta functions of such singularities correspond to…

Algebraic Geometry · Mathematics 2026-02-19 Matt Larson , Sam Payne , Alan Stapledon

We show that the universal abelian cover of the complement to a germ of a reducible divisor on a complex space $Y$ with isolated singularity is $(dimY-2)$-connected provided that the divisor has normal crossings outside of the singularity…

Algebraic Geometry · Mathematics 2007-05-23 Alexandru Dimca , Anatoly Libgober

Local diffusion of strictly hyperbolic higher-order PDE's with constant coefficients at all simple singularities of corresponding wavefronts can be explained and recognized by only two local geometrical features of these wavefronts. We…

Analysis of PDEs · Mathematics 2020-02-26 Victor A. Vassiliev

The compact complex manifolds considered in this article are principal torus bundles over a torus. We consider the Kodaira Spencer map of the complete Appell Humbert family (introduced by the first author in Part I) and are able to show…

Complex Variables · Mathematics 2007-05-23 Fabrizio Catanese , Paola Frediani

In the authors's previous work on symmetric differentials and their connection to the topological properties of the ambient manifold, a class of symmetric differentials was introduced: closed symmetric differentials ([BoDeO11] and…

Algebraic Geometry · Mathematics 2014-10-07 Fedor Bogomolov , Bruno De Oliveira

A commutative associative algebra A with an identity over the field of real numbers which has a basis, where all elements are invertible, is considered in the work. Moreover, among matrixes consisting of the structure constants of A, there…

Complex Variables · Mathematics 2020-09-29 T. M. Osipchuk

In this note we consider a few interesting properties of discrete connections on principal bundles when the structure group of the bundle is an abelian Lie group. In particular, we show that the discrete connection form and its curvature…

Differential Geometry · Mathematics 2024-08-19 Javier Fernandez , Mariana Juchani , Marcela Zuccalli

In the present work, we consider a fractional p-Kirchhoff equation in the entire space R^N featuring doubly nonlinearities, involving a generalized nonlocal Choquard subcritical term together with a local critical Sobolev term; the problem…