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In this paper (a sequel to B. Drinovec Drnovsek and F. Forstneric, Holomorphic curves in complex spaces, Duke Math. J. 139 (2007), 203-253) we obtain existence and approximation results for closed complex subvarieties that are normalized by…

Complex Variables · Mathematics 2011-09-02 Barbara Drinovec Drnovsek , Franc Forstneric

We discuss various phenomena of tangency in projective and convex geometry.

Algebraic Geometry · Mathematics 2011-03-07 Roland Abuaf

We give an elementary characterization of rational functions among meromorphic functions in the complex plane.

Complex Variables · Mathematics 2017-12-13 Bao Qin Li

In the first part of this note, we review results concerning analytic characterization of convexity for planar sets. The second part is devoted to results valid for arbitrary $m \ge 2$.

Analysis of PDEs · Mathematics 2024-06-18 Nikolay Kuznetsov

We study the properties of a generalized metallic, a generalized product and a generalized complex structure induced on the generalized tangent bundle of $M$ by a metallic Riemannian structure $(J,g)$ on $M$, providing conditions for their…

Differential Geometry · Mathematics 2025-08-04 Adara M. Blaga , Antonella Nannicini

Some geometric structures with associated Riemannian metrics have been considered in the book.

Differential Geometry · Mathematics 2008-05-23 Alexander A. Ermolitsky

Classical Schur analysis is intimately connected to the theory of orthogonal polynomials on the circle [Simon, 2005]. We investigate here the connection between multipoint Schur analysis and orthogonal rational functions. Specifically, we…

Classical Analysis and ODEs · Mathematics 2010-02-11 L. Baratchart , S. Kupin , V. Lunot , M. Olivi

We define, in the frame of an abstract Wiener space, the notions of convexity and of concavity for the equivalence classes of random variables. As application we show that some important inequalities of the finite dimensional case have…

Probability · Mathematics 2008-09-05 D. Feyel , A. S. Üstünel

Motivated by physics, we propose two conjectures regarding the cohomology ring of the crepant resolutions of orbifolds and cohomological invariants of K-equivalent manifolds.

Algebraic Geometry · Mathematics 2007-05-23 Yongbin Ruan

We introduce the tautological rings of moduli stacks of twisted curves and establish some basic properties.

Algebraic Geometry · Mathematics 2025-10-02 Hsian-Hua Tseng

Developing ideas of \cite{Fei}, we introduce canonical cosimplicial cohomology of meromorphic functions for infinite-dimensional Lie algebra formal series with prescribed analytic behavior on domains of a complex manifold $M$. Graded…

Functional Analysis · Mathematics 2021-10-07 A. Zuevsky

In this short note we try to generalize the Clemens-Griffiths criterion of non-rationality for smooth cubic threefolds to the case of smooth cubic fourfolds.

Algebraic Geometry · Mathematics 2019-08-14 Kalyan Banerjee

In this paper we prove that every Stein manifold $S$ admits a proper holomorphic immersion into any Stein manifold $X$ of dimension $2\mathrm{dim}S$ enjoying the density property or the volume density property. The case $\mathrm{dim}S=1$…

Complex Variables · Mathematics 2020-04-09 Franc Forstneric

Torus orbifolds are topological generalization of symplectic toric orbifolds. We give a construction of smooth orbifolds with torus actions whose boundary is a disjoint union of torus orbifolds using toric topological method. As a result,…

Algebraic Topology · Mathematics 2019-05-21 Soumen Sarkar , Dong Youp Suh

In this article, we consider Bergman kernels related to modules at boundary points on Stein manifolds, and obtain a log-subharmonicity property of the Bergman kernels. As applications, we obtain a lower estimate of weighted $L^2$ integrals…

Complex Variables · Mathematics 2023-01-03 Shijie Bao , Qi'an Guan

In this note we show how a generalized Pohozaev-Schoen identity due to Gover and Orsted \cite{GO} can be used to obtain some rigidity results for $V$-static manifolds and generalized solitons. We also obtain an Alexandrov type result for…

Differential Geometry · Mathematics 2016-07-12 Ezequiel Barbosa , Levi Lopes de Lima , Allan Freitas

We describe a procedure, called regularisation, that allows us to study geometric structures on Lie algebroids via foliated geometric structures on a manifold of higher dimension. This procedure applies to various classes of Lie algebroids;…

Differential Geometry · Mathematics 2022-11-29 Álvaro del Pino , Aldo Witte

Polyhedral surfaces are fundamental objects in architectural geometry and industrial design. Whereas closeness of a given mesh to a smooth reference surface and its suitability for numerical simulations were already studied extensively, the…

Metric Geometry · Mathematics 2017-03-17 Felix Günther , Caigui Jiang , Helmut Pottmann

We study some basic properties and examples of Hermitian metrics on complex manifolds whose traces of the curvature of the Chern connection are proportional to the metric itself.

Differential Geometry · Mathematics 2020-07-22 Daniele Angella , Simone Calamai , Cristiano Spotti

We demonstrate how by using the intersection theory to calculate the cohomology of $G_2$-manifolds constructed by using the generalized Kummer construction. For one example we find the generators of the rational cohomology ring and describe…

Algebraic Topology · Mathematics 2019-04-10 Iskander A. Taimanov