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We classify hypersurfaces of the Minkowski space $\L^{n+1}$ that carry a totally geodesic foliation with complete leaves of codimension one. We prove that such a hypersurface is ruled, or a partial tube over a curve or contains a two or…

Differential Geometry · Mathematics 2018-10-16 S. M. B. Kashani , M. J. Vanaei , S. M. Yaghoobi

We define a combinatorial object that can be associated with any conic-line arrangement with ordinary singularities, which we call the combinatorial Poincar\'e polynomial. We prove a Terao-type factorization statement on the splitting of…

Algebraic Geometry · Mathematics 2025-08-19 Piotr Pokora

For some values of the degrees of the equations, we show, using geometric invariant theory, that the coarse moduli space of smooth complete intersections in P^N is quasi-projective. ----- Pour certaines valeurs des degres des equations, on…

Algebraic Geometry · Mathematics 2019-11-11 Olivier Benoist

In this paper we study germs of holomorphic foliations, at the origin of the complex plane, tangent to Pfaffian hypersurfaces - integral hypersurfaces of real analytic 1-forms - satisfying the Rolle-Khovanskii condition. This hypothesis…

Complex Variables · Mathematics 2024-08-08 Arturo Fernández-Pérez , Rogério Mol , Rudy Rosas

In this paper, we prove several Poincar\'e inequalities of fractional type on conformally flat manifolds with finite total Q-curvature. This shows a new aspect of the $Q$-curvature on noncompact complete manifolds.

Differential Geometry · Mathematics 2016-01-05 Yannick Sire , Yi Wang

Let M be a compact Riemannian manifold and E a Riemannian vector bundle on M. We look for hypersurfaces of E with a prescribed vertical Gaussian curvature. In trying to solve this problem fibre-wise, we loose the regularity of the resulting…

Differential Geometry · Mathematics 2016-01-26 Abdellah Hanani

We study codimension one holomorphic distributions on the projective three-space, analyzing the properties of their singular schemes and tangent sheaves. In particular, we provide a classification of codimension one distributions of degree…

Algebraic Geometry · Mathematics 2021-08-03 Omegar Calvo-Andrade , Maurício Corrêa , Marcos Jardim

It is expected that a totally invariant divisor of a non-isomorphic endomorphism of the complex projective space is a union of hyperplanes. In this paper, we compute an upper bound for the degree of such a divisor. As a consequence, we…

Algebraic Geometry · Mathematics 2021-11-30 Mabed Yanis

In this paper we construct strong exceptional collections of vector bundles on smooth projective varieties that have a prescribed endomorphism algebra. We prove the construction problem always have a solution. We consider some applications…

Algebraic Geometry · Mathematics 2015-11-19 Dmitri Orlov

We study the relationship between singular holomorphic foliations in $(\mathbb{C}^{2},0)$ and their separatrices. Under mild conditions we describe a complete set of analytic invariants characterizing foliations with quasi-homogeneous…

Complex Variables · Mathematics 2014-07-18 L. M. Câmara , B. Scardua

In the first part of this paper we prove some new Poincar\'e inequalities, with explicit constants, for domains of any hypersurface of a Riemannian manifold with sectional curvatures bounded from above. This inequalities involve the first…

Differential Geometry · Mathematics 2017-08-30 Hilário Alencar , Gregório Silva Neto

We classify the holomorphic parabolic geometries on compact complex manifolds of general type. We accomplish this by bounding the numerical dimension of any smooth projective variety in terms of geometric invariants of the flag variety…

Differential Geometry · Mathematics 2026-01-06 Benjamin McKay

We show that the isolated invariant branches globalize to algebraic curves, when we consider weak toric type complex hyperbolic foliations on projective toric ambient surfaces. To do it, we pass through a characterization of weak toric type…

Algebraic Geometry · Mathematics 2019-02-14 Beatriz Molina-Samper

We show a stability-type theorem for foliations on projective spaces which arise as pullbacks of foliations with a split tangent sheaf on weighted projective spaces. As a consequence, we will be able to construct many irreducible components…

Algebraic Geometry · Mathematics 2025-01-14 Javier Gargiulo Acea , Ariel Molinuevo , Federico Quallbrunn , Sebastián Lucas Velazquez

We investigate the accumulation to singular points of leaves of codimension one foliations whose normal bundle is ample, with emphasis on the nonexistence of Levi-flat hypersurfaces.

Complex Variables · Mathematics 2007-06-12 Marco Brunella

In this work, we study dominant rational maps preserving singular holomorphic codimension one foliations on projective manifolds and that exhibit non-trivial transverse dynamics.

Algebraic Geometry · Mathematics 2020-11-02 Federico Lo Bianco , Jorge Pereira , Erwan Rousseau , Frédéric Touzet

A compact Polish foliated space is considered. Part of this work studies coarsely quasi-isometric invariants of leaves in some residual saturated subset when the foliated space is transitive. In fact, we also use "equi-" versions of this…

Geometric Topology · Mathematics 2017-12-11 Jesús A. Álvarez López , Alberto Candel

The boundary at infinity of a quasifuchsian hyperbolic manifold is equiped with a holomorphic quadratic differential. Its horizontal measured foliation $f$ can be interpreted as the natural analog of the measured bending lamination on the…

Geometric Topology · Mathematics 2017-08-08 Jean-Marc Schlenker

Let ${\mathcal F}$ be a germ of holomorphic foliation defined in a neighborhood of the origin of ${\mathbb C}^{2}$ that has a germ of irreducible holomorphic invariant curve $\gamma$. We provide a lower bound for the vanishing multiplicity…

Algebraic Geometry · Mathematics 2023-11-15 José Cano , Pedro Fortuny Ayuso , Javier Ribón

We introduce a spectrum of monotone coarse invariants for metric measure spaces called Poincar\'{e} profiles. The two extremes of this spectrum determine the growth of the space, and the separation profile as defined by…

Group Theory · Mathematics 2020-11-09 David Hume , John M. Mackay , Romain Tessera
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