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This note gives the complete projective classification of rational, cuspidal plane curves of degree at least 6, and having only weighted homogeneous singularities. It also sheds new light on some previous characterizations of free and…

Algebraic Geometry · Mathematics 2017-07-31 Alexandru Dimca

We present an approach to a large class of enumerative problems concerning rational curves in projective spaces. This approach uses analysis to obtain topological information about moduli spaces of stable maps. We demonstrate it by…

Algebraic Geometry · Mathematics 2014-11-11 Aleksey Zinger

This paper presents a spline-based parameterisation framework for plane graphs. The plane graph is characterised by a collection of curves forming closed loops that fence-off planar faces which have to be parameterised individually. Hereby,…

Numerical Analysis · Mathematics 2024-09-02 Jochen Hinz

In this paper, we continue the study of the relation between rational points of rational elliptic surfaces and plane curves. As an application, we give first examples of Zariski pairs of cubic-line arrangements that do not involve…

Algebraic Geometry · Mathematics 2017-11-15 Shinzo Bannai , Hiro-o Tokunaga , Momoko Yamamoto

We classify holomorphic Cartan geometries on every compact complex curve, and on every compact complex surface which contains a rational curve.

Differential Geometry · Mathematics 2019-11-12 Benjamin McKay

We develop an essentially algebraic method to study biharmonic curves into an implicit surface. Although our method is rather general, it is especially suitable to study curves into surfaces defined by a polynomial equation: in particular,…

Differential Geometry · Mathematics 2013-09-04 S. Montaldo , A. Ratto

We study neighborhoods of rational curves in surfaces with self-intersection number 1 that can be linearised.

Complex Variables · Mathematics 2016-02-25 M. Falla Luza , P. Sad

One considers the behavior of the degree of a rational map under specialization of the coefficients of the defining linear system. The method rests on the classical idea of Kronecker as applied to the context of projective schemes and their…

Algebraic Geometry · Mathematics 2020-07-09 Yairon Cid-Ruiz , Aron Simis

We pose some questions about spaces parametrizing rational curves on rationally connected varieties. We give a partial answer for cubic threefolds. Many of our results were previously proved by Iliev, Markushevich and Tikhimirov by…

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

In this paper, we study unirational differential curves and the corresponding differential rational parametrizations. We first investigate basic properties of proper differential rational parametrizations for unirational differential…

Algebraic Geometry · Mathematics 2020-01-27 Lei Fu , Wei Li

We determine those maps between affine or projective spaces that are linear in the abstract sense of transforming collinear points into collinear points and whose restriction to any line is constant or injective. Our results are extensions…

Algebraic Geometry · Mathematics 2023-07-28 Juan B. Sancho de Salas

We investigate the interplay between linear systems on curves and graphs in the context of specialization of divisors on an arithmetic surface. We also provide some applications of our results to graph theory, arithmetic geometry, and…

Number Theory · Mathematics 2007-07-05 Matthew Baker

We classify the planar cubic Cayley graphs of connectivity 2, providing an explicit presentation and embedding for each of them. Combined with [9] this yields a complete description of all planar cubic Cayley graphs.

Group Theory · Mathematics 2015-03-18 Agelos Georgakopoulos

A degeneration of curves gives rise to an interesting relation between linear systems on curves and on graphs. In this paper, we consider the case of linear pencils and as an application, we obtain some results on pencils on real curves.

Algebraic Geometry · Mathematics 2010-06-10 Filip Cools , Marc Coppens

We discuss some examples of geometrically meaningful rational self-maps of moduli space of curves of low genus and homogeneous forms.

Algebraic Geometry · Mathematics 2017-12-05 Igor V. Dolgachev

We study plane algebraic curves defined over a field k of arbitrary characteristic as coverings of the the projective line and the problem of enumerating branched coverings of $\mathbb{P}^{1}$ by using combinatorial methods.

Algebraic Geometry · Mathematics 2012-09-20 Alberto Besana , Cristina Martinez

We survey some results on real rational surfaces focused on their topology and their birational geometry.

Algebraic Geometry · Mathematics 2025-05-26 Frederic Mangolte

We study the parameter space of a family of planar maps, which are linear on each of the right and left half-planes. We consider the set of parameters for which every orbit recurs to the boundary between half-planes. These parameters…

Dynamical Systems · Mathematics 2021-08-11 John A. G. Roberts , Asaki Saito , Franco Vivaldi

We present a matrix-based algorithm for deciding if the parametrization of a curve or a surface is invertible or not, and for computing the inverse of the parametrization if it exists.

Commutative Algebra · Mathematics 2007-05-23 Carlos D'Andrea , Laurent Buse

Trilinear mappings appear naturally when performing spatial isogeometric discretizations of degree $p = 1$. Among them, birational maps are characterized by the property that both the mapping and the associated inverse map are rational and…

Algebraic Geometry · Mathematics 2026-03-12 Bert Jüttler , Pablo Mazón , Josef Schicho