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The purpose of this paper is to establish a partial regularity theory on certain homogeneous complex Monge-Ampere equations. As consequences of this new theory, we prove the uniqueness of extremal Kaehler metrics and give an necessary…

Differential Geometry · Mathematics 2007-05-23 Xiuxiong Chen , Gang Tian

We study holomorphic foliations of codimension $k\geq 1$ on a complex manifold $X$ of dimension $n+k$ from the point of view of the exceptional minimal set conjecture. For $n\geq 2$ we show in particular that if the holomorphic normal…

Complex Variables · Mathematics 2021-07-07 Judith Brinkschulte

We prove an analogue of the Hitchin-Kobayashi correspondence for compact, oriented, taut Riemannian foliated manifolds with transverse Hermitian structure. In particular, our Hitchin-Kobayashi theorem holds on any compact Sasakian manifold.…

Differential Geometry · Mathematics 2022-09-30 David Baraglia , Pedram Hekmati

In this paper, we prove a higher Lefschetz formula for foliations in the presence of a closed Haefliger current. We associate with such a current an equivariant cyclic cohomology class of Connes' C*-algebra of the foliation, and compute its…

K-Theory and Homology · Mathematics 2010-04-01 Moulay-Tahar Benameur , James L. Heitsch

H-holomorphic maps are a parameter version of J-holomorphic maps into contact manifolds. They have arisen in efforts to prove the existence of higher--genus holomorphic open book decompositions and efforts to prove the existence of finite…

Symplectic Geometry · Mathematics 2009-07-23 Jens von Bergmann

Let $\FF$ be a codimension one foliation on a closed manifold $M$ which admits a transverse dimension one Riemannian foliation. Then any continuous leafwise harmonic functions are shown to be constant on leaves.

Dynamical Systems · Mathematics 2014-05-01 Shigenori Matsumoto

Thirty years after the birth of foliations in the 1950's, Andr\'e Haefliger has introduced a special property satisfied by holonomy pseudogroups of foliations on compact manifolds, called compact generation. Up to now, this is the only…

Geometric Topology · Mathematics 2009-04-30 Nicolas Raimbaud

A singular foliation on a complete riemannian manifold M is said to be riemannian if each geodesic that is perpendicular at one point to a leaf remains perpendicular to every leaf it meets. We prove that the regular leaves are equifocal,…

Differential Geometry · Mathematics 2011-02-01 Marcos M. Alexandrino , Dirk Toeben

We explain a correct proof of the decomposition theorem for direct images of constant Hodge modules by proper K\"ahler morphisms of complex manifolds. We also give some examples showing certain difficulty in the non-constant Hodge module…

Algebraic Geometry · Mathematics 2022-05-27 Morihiko Saito

In this short note we prove that the number of deformation types of compact hyperkaehler manifolds with prescribed second cohomology and second Chern class is finite. The proof uses the finiteness result of Kollar and Matsusaka, a formula…

Algebraic Geometry · Mathematics 2007-05-23 Daniel Huybrechts

The purpose of this paper is to establish a completely new partial regularity theory on certain homogeneous complex Monge-Ampere equations. Our partial regularity theory will be obtained by studying foliations by holomorphic curves and and…

Differential Geometry · Mathematics 2007-05-23 X. X. Chen , G. Tian

We study stability of non-compact gradient Kaehler-Ricci flow solitons with positive holomorphic bisectional curvature. Our main result is that any compactly supported perturbation and appropriately decaying perturbations of the Kaehler…

Differential Geometry · Mathematics 2007-05-23 Albert Chau , Oliver C. Schnuerer

On a complex symplectic manifold we prove a finiteness result for the global sections of solutions of holonomic DQ-modules in two cases: (a) by assuming that there exists a Poisson compactification (b) in the algebraic case. This extends…

Algebraic Geometry · Mathematics 2021-05-19 Masaki Kashiwara , Pierre Schapira

A foliation on a compact manifold is uniform if each pair of leaves of the induced foliation on the universal cover are at finite Hausdorff distance from each other. We study uniform foliations with Reeb components. We give examples of such…

Geometric Topology · Mathematics 2023-11-29 Joaquín Lema

The main theorem states that any complete connected Riemannian manifold of bounded geometry can be isometrically realized as a leaf with trivial holonomy in a compact Riemannian foliated space.

Geometric Topology · Mathematics 2016-12-21 Jesús A. Álvarez López , Ramón Barral Lijó

We answer affirmatively a question posed by Morita on homological stability of surface diffeomorphisms made discrete. In particular, we prove that $C^{\infty}$-diffeomorphisms and volume preserving diffeomorphisms of surfaces as family of…

Algebraic Topology · Mathematics 2018-03-16 Sam Nariman

This paper is devoted to the study of codimension two holomorphic foliations and distributions. We prove the stability of complete intersection of codimension two distributions and foliations in the local case. Converserly we show the…

Dynamical Systems · Mathematics 2016-06-01 Dominique Cerveau , Alcides Lins Neto

Let $(X,\omega)$ be a compact Hermitian manifold. We establish a stability result for solutions to complex Monge-Amp\`ere equations with right-hand side in $L^p$, $p>1$. Using this we prove that the solutions are H\"older continuous with…

Complex Variables · Mathematics 2020-11-17 Chinh H. Lu , Trong-Thuc Phung , Tât-Dat Tô

A noncompact (oriented) surface satisfies the condition $(\star)$ if their isolated ends are ''accumulated by genus''. We show that every surface satisfying this condition is homeomorfic to the leaf of a minimal codimension one foliation on…

Geometric Topology · Mathematics 2024-01-04 Paulo Gusmão , Carlos Meniño Cotón

Let $X$ be a Stein manifold of complex dimension $n>1$ endowed with a Riemannian metric $\mathfrak{g}$. We show that for every integer $k$ with $\left[\frac{n}{2}\right] \le k \le n-1$ there is a nonsingular holomorphic foliation of…

Complex Variables · Mathematics 2024-04-30 Antonio Alarcon , Franc Forstneric
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