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We establish a transcendental generalization of Nakamaye's theorem to compact complex manifolds when the form is not assumed to be closed. We apply the recent analytic technique developed by Collins--Tosatti to show that the non-Hermitian…

Complex Variables · Mathematics 2024-04-02 Quang-Tuan Dang

We give a partial account of some problems concerning cohomological invariants and metric properties of complex non-K\"ahler manifolds.

Differential Geometry · Mathematics 2026-02-04 Daniele Angella , Nicoletta Tardini

We define additional gradings on two generalisations of Khovanov homology (one due to the first author, the other due to the second), and use them to define invariants of various kinds of embeddings. These include invariants of links in…

Geometric Topology · Mathematics 2018-09-07 Vassily Olegovich Manturov , William Rushworth

In complex geometry a classical and useful invariant of a complex manifold is its Kodaira dimension. Since its introduction by Iitaka in the early 70's, its behavior under deformations was object of study and it is known that Kodaira…

Complex Variables · Mathematics 2023-07-27 Andrea Cattaneo

We consider embeddings of a finite complex in a sphere. We give a homotopy theoretic classification of such embeddings in a wide range.

Algebraic Topology · Mathematics 2007-05-23 John R. Klein

It is shown that the notion of W_\infty-algebra originally carried out over a (compact) Riemann surface can be extended to n complex dimensional (compact) manifolds within a symplectic geometrical setup. The relationships with the…

High Energy Physics - Theory · Physics 2015-06-26 G. Bandelloni , S. Lazzarini

We provide several families of compact complex curves embedded in smooth complex surfaces such that no neighborhood of the curve can be embedded in an algebraic surface. Different constructions are proposed, by patching neighborhoods of…

Algebraic Geometry · Mathematics 2024-07-30 Maycol Falla Luza , Frank Loray , Paulo Sad

We present the extended Kuranishi space for Kodaira surface as a non-trivial example to Kontsevich and Barannikov's extended deformation theory. We provide a non-trivial example of Hertling-Manin's weak Frobenius manifold. In addition, we…

Differential Geometry · Mathematics 2007-05-23 Yat Sun Poon

We classify irreducible d-semistable degenerations of primary Kodaira surfaces. As an application we construct a canonical completion for the moduli space of primary Kodaira surfaces.

Algebraic Geometry · Mathematics 2007-05-23 Stefan Schroeer , Bernd Siebert

This is the sequel to our first paper concerning the balanced embedding of a non-compact complex manifold into an infinite-dimensional projective space. We prove the uniqueness of such an embedding. The proof relies on fine estimates of the…

Complex Variables · Mathematics 2023-11-21 Jingzhou Sun

In this paper we extend a Calderon-Zygmund commutator-type estimate. This estimate enables us to prove an embedding result concerning weighted function spaces.

Functional Analysis · Mathematics 2015-06-26 Mirko Tarulli , J. Michael Wilson

In a recent work, Kai Tang conjectured that any compact Hermitian manifold with non-zero constant mixed curvature must be K\"ahler. He confirmed the conjecture in complex dimension $2$ and for Chern K\"ahler-like manifolds in general…

Differential Geometry · Mathematics 2025-10-14 Shuwen Chen , Fangyang Zheng

We consider isometric immersions of complete connected Riemannian manifolds into space forms of nonzero constant curvature. We prove that if such an immersion is compact and has semi-definite second fundamental form, then it is an embedding…

Differential Geometry · Mathematics 2018-03-22 Ronaldo F. de Lima , Rubens L. de Andrade

We present a modern proof of some extensions of the celebrated Hirsch-Pugh-Shub theorem on persistence of normally hyperbolic compact laminations. Our extensions consist of allowing the dynamics to be an endomorphism, of considering the…

Dynamical Systems · Mathematics 2008-08-01 Pierre Berger

New obstructions for embedding one compact oriented 3-manifold in another are given. A theorem of D. Krebes concerning 4-tangles embedded in links arises as a special case. Algebraic and skein-theoretic generalizations for 2n-tangles…

Geometric Topology · Mathematics 2009-11-10 Jozef H. Przytycki , Daniel S. Silver , Susan G. Williams

We show that any compact almost-complex manifold of complex dimension m can be pseudo-holomorphically embedded in R^(6m) equipped with a suitable almost-complex structure.

Differential Geometry · Mathematics 2011-07-18 Antonio J. Di Scala , Daniele Zuddas

We show that a totally geodesic submanifold of a symmetric space satisfying certain conditions admits an extension to a minimal submanifold of dimension one higher, and we apply this result to construct new examples of complete embedded…

Differential Geometry · Mathematics 2007-05-23 Claudio Gorodski

In this survey, we discuss whether the complex projective space can be characterized by its integral cohomology ring among compact complex manifolds.

Algebraic Geometry · Mathematics 2015-12-15 Olivier Debarre

We introduce K-deformations of generalized complex structures on a compact Kahler manifold $M=(X, J)$ with an effective anti-canonical divisor and show that obstructions to K-deformations of generalized complex structures on $M$ always…

Differential Geometry · Mathematics 2012-07-30 Ryushi Goto

On a class of compact Hermitian manifolds including compact K\"{a}hler manifolds, we prove that the the relative non-pluripolar product is always well-defined. We also prove the monotonicity of the relative non-pluripolar product in terms…

Differential Geometry · Mathematics 2025-06-02 Zhenghao Li , Shuang Su