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In this paper, we establish a truncated non-integrated defect relation for meromorphic mappings from a complete K\"ahler manifold into a projective variety intersecting a family of hypersurfaces located in subgeneral position, where the…

Complex Variables · Mathematics 2020-10-08 Si Duc Quang , Le Ngoc Quynh , Nguyen Thi Nhung

We consider the class of Levi nondegenerate hypersurfaces $M$ in $\bC^{n+1}$ that admit a local (CR transversal) embedding, near a point $p\in M$, into a standard nondegenerate hyperquadric in $\Bbb C^{N+1}$ with codimension $k:=N-n$ small…

Complex Variables · Mathematics 2007-05-23 P. Ebenfelt , X. Huang , D. Zaitsev

The main aim of this article is to give some sufficient conditions for a family of meromorphic mappings on a domain D in C^n into P^N(C) to be meromorphically normal if they satisfy only some very weak conditions with respect to moving…

Complex Variables · Mathematics 2015-05-11 Gerd Dethloff , Thai Do Duc , Trang Pham Nguyen Thu

The existence of universal unfoldings of certain germs of meromorphic connections is established. This is used to prove a general construction theorem for Frobenius manifolds. A particular case is Dubrovin's theorem on semisimple Frobenius…

Algebraic Geometry · Mathematics 2007-05-23 Claus Hertling , Yuri Manin

The Marden theorem of geometry of polynomials and the great Poncelet theorem from projective geometry of conics by their classical beauty occupy very special places. Our main aim is to present a strong and unexpected relationship between…

Classical Analysis and ODEs · Mathematics 2008-12-31 Vladimir Dragovic

Let $M$ be a $n$-dimensional complex manifold and $f,g:M\to M$ two distinct holomorphic self-maps. Suppose that $f$ and $g$ coincide on a globally irreducible compact hypersurface $S\subset M$. We show that if one of the two maps is a local…

Complex Variables · Mathematics 2016-04-11 Paolo Arcangeli

In this paper, we firstly give the definition of meromorphic function element and algebroid mapping. We also construct the algebroid function family in which the arithmetic, differential operations is closed. On basis of these works, we…

Complex Variables · Mathematics 2009-12-15 Daochun Sun , Zongsheng Gao , Huifang Liu

In this paper, we consider local holomorphic mappings f: M\to M' between real algebraic CR generic manifolds (or more generally, real algebraic sets with singularities) in the complex euclidean spaces of different dimensions and we search…

Complex Variables · Mathematics 2007-05-23 Joel Merker

Using the analytic theory of differential equations, we construct examples of formally but not holomorphically equivalent real-analytic Levi nonflat hypersurfaces in $\CC{n}$ together with examples of such hypersurfaces with divergent…

Complex Variables · Mathematics 2013-10-08 I. Kossovskiy , R. Shafikov

In this paper, we study the real hypersurfaces $M$ in $\mathbb C^2$ at points $p\in M$ of infinite type. The degeneracy of $M$ at $p$ is assumed to be the least possible, namely such that the Levi form vanishes to first order in the CR…

Complex Variables · Mathematics 2015-10-21 Peter Ebenfelt , Bernhard Lamel , Dmitri Zaitsev

Replaced by a shorter version which appeared in press.

Complex Variables · Mathematics 2017-01-23 S. Ivashkovich , F. Meylan

We prove and organize some results on the normal forms of Hermitian operators composed with the Veronese map. We apply this general framework to prove two specific theorems in CR geometry. First, extending a theorem of Faran, we classify…

Complex Variables · Mathematics 2011-11-16 Jiri Lebl

Let $Y_{1}, \ldots, Y_{q}$ be closed subschemes which are located in $\ell$-subgeneral position with index $\kappa$ in a complex projective variety $X$ of dimension $n.$ Let $A$ be an ample Cartier divisor on $X.$ We obtain that if a…

Algebraic Geometry · Mathematics 2023-12-27 Liang Wang , Tingbin Cao , Hongzhe Cao

Let $K$ be a field of characteristic $0$. We present an explicit algorithm that, given the invariants of a generic homogeneous polynomial $f$ under the linear action of $\mathrm{GL}_n$ or $\mathrm{SL}_n$, returns a polynomial differing from…

Commutative Algebra · Mathematics 2025-06-05 Thomas Bouchet

We show that for any real-analytic submanifold M in C^N there is a proper real-analytic subvariety V contained in M such that for any point p in M\V, any real-analytic submanifold M' in C^N, and any point p' in M', the germs of the…

Complex Variables · Mathematics 2007-05-23 M. S. Baouendi , Linda Preiss Rothschild , Dmitri Zaitsev

With the help of the theory of holomorphic and anti-holomorphic differentials, G. A. Jones [Chiral covers of hypermaps, Ars Math. Contemp. 8 (2015), 425-431] proved that every regular hypermap of a non-spherical type is covered by an…

Group Theory · Mathematics 2024-02-23 Olivia Reade , Jozef Širáň

Let $V$ be a vertex algebra and $M$ a $V$-module. We define the first and second cohomology of $V$ with coefficients in $M$, and we show that the second cohomology $H^{2}(V, M)$ corresponds bijectively to the set of equivalence classes of…

Quantum Algebra · Mathematics 2016-03-28 Jose I. Liberati

We consider the space of ordered pairs of distinct $\mathbb{C}P^1$-structures on Riemann surfaces (of any orientations) which have identical holonomy, so that the quasi-Fuchsian space is identified with a connected component of this space.…

Geometric Topology · Mathematics 2023-06-16 Shinpei Baba

The tropical Nevanlinna theory is Nevanlinna theory for tropical functions or maps over the max-plux semiring by using the approach of complex analysis. The main purpose of this paper is to study the second main theorem with tropical…

Complex Variables · Mathematics 2026-01-29 Tingbin Cao , Jianhua Zheng

We introduce a canonical Chern-Weil map for possibly non-commutative g-differential algebras with connection. Our main observation is that the generalized Chern-Weil map is an algebra homomorphism ``up to g-homotopy''. Hence, the induced…

Representation Theory · Mathematics 2008-10-24 A. Alekseev , E. Meinrenken