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In this paper, we first prove that the totally real discs lying in certain Levi flat hypersurfaces are polynomially convex. As applications we prove that the totally real discs lying in the boundary of certain polynomial polyhedra are…

Complex Variables · Mathematics 2023-05-10 Sushil Gorai , Golam Mostafa Mondal

Consider the scheme parametrizing non-constant morphisms from a fixed projective curve to a projective surface. There is a rational map between this scheme and the Chow variety of $1$-cycles on the surface. We prove that, if the curve is…

Algebraic Geometry · Mathematics 2020-11-03 Lucas das Dores

We study the family of rational curves on arbitrary smooth hypersurfaces of low degree using tools from analytic number theory.

Algebraic Geometry · Mathematics 2018-03-16 Tim Browning , Pankaj Vishe

We characterize analytic curves that contain non-trivial self-affine sets. We also prove that compact algebraic surfaces cannot contain non-trivial self-affine sets.

Dynamical Systems · Mathematics 2018-05-22 De-Jun Feng , Antti Käenmäki

The Jacobian ideal provides the set of infinitesimally trivial deformations for a homogeneous polynomial, or for the corresponding complex projective hypersurface. In this article, we investigate whether the associated linear deformation is…

Algebraic Geometry · Mathematics 2016-12-22 Zhenjian Wang

A theorem of Wiegerinck asserts that the Bergman space of an open subset of the complex numbers is either infinite-dimensional or trivial. Recently, this has been generalized to holomorphic vector bundles over the projective line by the…

Complex Variables · Mathematics 2026-03-20 László Koltai , Alexander A. Kubasch , Róbert Szőke

We prove that the Albanese map of a smooth projective threefold, whose anticanonical bundle is nef, is a surjective submersion. We also investigate morphisms of threefolds to curves and surfaces whose relative anticanonical bundle are nef.

Algebraic Geometry · Mathematics 2007-05-23 Thomas Peternell , Fernando Serrano

We present a simple proof of the surface classification theorem using normal curves. This proof is analogous to Kneser's and Milnor's proof of the existence and uniqueness of the prime decomposition of 3-manifolds. In particular, we do not…

Geometric Topology · Mathematics 2026-02-10 Fethi Ayaz , Marc Kegel , Klaus Mohnke

A new, simple method to approach enumerative questions about rational curves on rational surfaces is described. Applications include a short proof of Kontsevich's formula for plane curves and a the solution of the analogous problem for the…

alg-geom · Mathematics 2008-02-03 Lucia Caporaso , Joe Harris

In [16] there was proved that any biharmonic hypersurface with at most three distinct principal curvatures in space forms has constant mean curvature. At the very last step of the proof, the argument relied on the fact that the resultant of…

Differential Geometry · Mathematics 2023-01-24 Ştefan Andronic , Yu Fu , Cezar Oniciuc

Several results concerning pairs of polynomially convex sets whose union is not even rationally convex are given. It is shown that there is no restriction on how two spaces can be embedded in some $\C^N$ so as to be polynomially convex but…

Complex Variables · Mathematics 2021-08-23 Alexander J. Izzo

We prove that every local complete intersection curve in $Spec(A)$, where $A$ is a commutative Noetherian ring of dimension three, is a set-theoretic complete intersection. An analogous result is established for local complete intersection…

Commutative Algebra · Mathematics 2025-11-12 Lisa Mandal , Md. Ali Zinna

We find a relation between a cubic hypersurface $Y$ and its Fano variety of lines $F(Y)$ in the Grothendieck ring of varieties. We prove that if the class of an affine line is not a zero-divisor in the Grothendieck ring of varieties, then…

Algebraic Geometry · Mathematics 2014-06-27 Sergey Galkin , Evgeny Shinder

In this paper, we establish a second main theorem for holomorphic curve intersecting hypersurfaces in general position in projective space with level of truncation. As an application, we reduce the number hypersurfaces in uniqueness problem…

Complex Variables · Mathematics 2017-09-01 Nguyen Van Thin

The linear orbit of a degree d hypersurface in $\mathbb{P}^n$ is its orbit under the natural action of PGL(n+1), in the projective space of dimension $N =\binom{n+d}{d} - 1$ parameterizing such hypersurfaces. This action restricted to a…

Algebraic Geometry · Mathematics 2025-03-12 Franquiz Caraballo Alba

We introduce tropical Newton-Puiseux polynomials admitting rational exponents. A resolution of a tropical hypersurface is defined by means of a tropical Newton-Puiseux polynomial. A polynomial complexity algorithm for resolubility of a…

Algebraic Geometry · Mathematics 2018-11-08 Dima Grigoriev

A smooth curve in the real projective plane is hyperbolic if its ovals are maximally nested. By the Helton-Vinnikov Theorem, any such curve admits a definite symmetric determinantal representation. We use polynomial homotopy continuation to…

Algebraic Geometry · Mathematics 2016-07-05 Anton Leykin , Daniel Plaumann

Fix a K3 lattice $\Lambda$ of rank two and $L\in\Lambda$ a big and nef divisor that is positive enough. We prove that the generic $\Lambda$-polarised K3 surface has an integral nodal rational curve in the linear system $|L|$, in particular…

Algebraic Geometry · Mathematics 2023-05-24 Xi Chen , Frank Gounelas , Christian Liedtke

Call a curve $C \subset \mathbb{P}^2$ defined over $\mathbb{F}_q$ transverse-free if every line over $\mathbb{F}_q$ intersects $C$ at some closed point with multiplicity at least 2. In 2004, Poonen used a notion of density to treat Bertini…

Algebraic Geometry · Mathematics 2025-02-04 Alejandro Lopez , Bella Villarreal , Ren Watson , Jaedon Whyte

We apply ideas related to the strength of polynomials to provide new cases of unirational hypersurfaces. It is famously known that hypersurfaces that are smooth in very high codimension are unirational, and a simple corollary then implies…

Algebraic Geometry · Mathematics 2024-10-29 Daniel Erman , Eric Riedl