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We describe the Hilbert schemes parametrizing curves on a cubic threefold of degree at most 5. In a forthcoming paper, we use this description to give a new proof and extension of a theorem of Iliev, Markushevich and Tikhimirov.

Algebraic Geometry · Mathematics 2007-05-23 Joe Harris , Mike Roth , Jason Starr

The \emph{canonical degree} of a curve $C$ on a surface $X$ is $K_X\cdot C$. Our main result, is that on a surface of general type there are only finitely many curves with negative self--intersection and sufficiently large canonical degree.…

Algebraic Geometry · Mathematics 2014-07-01 Ciro Ciliberto , Xavier Roulleau

Let $G$ be a reductive group acting on an affine scheme $V$. We study the set of principal $G$-bundles on a smooth projective curve $\mathcal C$ such that the associated $V$-bundle admits a section sending the generic point of $\mathcal C$…

Algebraic Geometry · Mathematics 2026-02-09 Huai-Liang Chang , Shuai Guo , Jun Li , Wei-Ping Li , Yang Zhou

We prove a uniqueness theorem for immersed spheres of prescribed (non-constant) mean curvature in homogeneous three-manifolds. In particular, this uniqueness theorem proves a conjecture by A.D. Alexandrov about immersed spheres of…

Differential Geometry · Mathematics 2015-04-29 Jose A. Galvez , Pablo Mira

This is the text of my lecture (in french) at the Bourbaki Seminar (november 2003) on the proof by Claire Voisin of the Green conjecture for a generic curve. This conjecture predicts the structure of the minimal resolution of the ideal of a…

Algebraic Geometry · Mathematics 2007-05-23 Arnaud Beauville

Modifying an approach of J. Roe, this paper gives an improved lower bound on the degrees d such that for general points p1,...,pn in P2 and m > 0 there is a plane curve of degree d vanishing at each point pi with multiplicity at least m. In…

Algebraic Geometry · Mathematics 2007-05-23 Brian Harbourne

We prove sharp $\ell^2$-decoupling inequalities for non-degenerate complex curves via the bilinear argument due to Guo--Li--Yung--Zorin-Kranich, which in turn is inspired by the efficient congruencing argument of Wooley. Secondly,…

Classical Analysis and ODEs · Mathematics 2026-03-03 Robert Schippa

We give a decomposition of the jacobian variety of a generalized Fermat curve. This extends a result obtained by Auffarth, Lucchini-Arteche and Rojas on Humbert-Edge curves, which are a particular case of generalized Fermat curves. (A…

Algebraic Geometry · Mathematics 2025-11-21 Gary Martinez-Nunez

In this expository note we present a proof of the V.A. Vassiliev conjecture on the planarity of graphs with vertices of degree 4 and certain additional structure. Both statement and proof are accessible to high-school students familiar with…

Combinatorics · Mathematics 2018-10-02 Arkadiy Skopenkov

It is proved the generalization of Toponogov theorem about the length of the curve in two-dimensional Riemannian manifolds in the case of two-dimensional Alexandrov spaces.

Differential Geometry · Mathematics 2020-07-06 Alexander A. Borisenko

We study the minimal degrees and gonalities of curves on complete intersections. We prove a classical conjecture which asserts that the degree of any curve on a general complete intersection $X \subseteq \mathbb{P}^N$ cut out by polynomials…

Algebraic Geometry · Mathematics 2024-06-19 Nathan Chen , Benjamin Church , Junyan Zhao

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

We give a combinatorial proof, using the hyperbolicity of the curve graphs, of the bounded geodesic image theorem of Masur and Minsky. Recently it has been shown that curve graphs are uniformly hyperbolic, thus a universal bound can be…

Geometric Topology · Mathematics 2013-01-29 Richard C. H. Webb

Green's conjecture is proved for smooth curves C lying on a rational surface S with an anticanonical pencil, under some mild hypotheses on the line bundle L defined by C. Constancy of Clifford dimension, Clifford index and gonality of…

Algebraic Geometry · Mathematics 2013-02-13 Margherita Lelli-Chiesa

We define several notions of interpolation for vector bundles on curves and discuss their relation to slope stability. The heart of the paper demonstrates how to use degeneration arguments to prove interpolation. We use these ideas to show…

Algebraic Geometry · Mathematics 2015-08-20 Atanas Atanasov

A telegraphic survey of some of the standard results and conjectures about the set $C({\bf Q})$ of rational points on a smooth projective absolutely connected curve $C$ over ${\bf Q}$.

Number Theory · Mathematics 2010-03-15 Chandan Singh Dalawat

This note compares the usual (absolute) Gromov-Witten invariants of a symplectic manifold with the invariants that count the curves relative to a (symplectic) divisor D. We give explicit examples where these invariants differ even though it…

Symplectic Geometry · Mathematics 2008-09-23 Dusa McDuff

This paper contains a detailed, self contained and more streamlined proof of our $l^2$ decoupling theorem for hypersurfaces.

Classical Analysis and ODEs · Mathematics 2016-11-15 Jean Bourgain , Ciprian Demeter

In this article we investigate regular curves whose derivatives have vanishing mean oscillations. We show that smoothing these curves using a standard mollifier one gets regular curves again. We apply this result to solve a couple of open…

Classical Analysis and ODEs · Mathematics 2016-03-14 Simon Blatt

While Kolmogorov's probability axioms are widely recognized, it is less well known that in an often-overlooked 1930 note, Kolmogorov proposed an axiomatic framework for a unifying concept of the mean -- referred to as regular means. This…

Statistics Theory · Mathematics 2026-01-15 Miguel de Carvalho