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We show that on integral normal separated schemes whose function field is separably closed, for each pair of points the intersection of the resulting local schemes is local. This extends a result of Artin from rings to schemes. The argument…

Algebraic Geometry · Mathematics 2021-10-04 Stefan Schröer

Using Serre's adelic interpretation of cohomology, we develop a `differential and integral calculus' on an algebraic curve X over an algebraically closed filed k of constants of characteristic zero, define algebraic analogs of additive…

Algebraic Geometry · Mathematics 2015-05-13 Leon A. Takhtajan

Given two elliptic curves, each of which is associated with a projection map that identifies opposite elements with respect to the natural group structure, we investigate how their corresponding projective images of torsion points…

Number Theory · Mathematics 2017-05-05 Fedor Bogomolov , Hang Fu

We express the Segre class of a monomial scheme -- or, more generally, a scheme monomially supported on a set of divisors cutting out complete intersections -- in terms of an integral computed over an associated body in euclidean space. The…

Algebraic Geometry · Mathematics 2021-02-08 Paolo Aluffi

In this paper we study the embedded topology of reducible plane curves having a smooth irreducible component. In previous studies, the relation between the topology and certain torsion classes in the Picard group of degree zero of the…

Algebraic Geometry · Mathematics 2022-06-01 E. Artal Bartolo , S. Bannai , T. Shirane , H. Tokunaga

We present an Arakelov theoretic version of the deformation to the normal cone. In particular, the geometric data is enriched with a deformation of a Hermitian line bundle. We introduce numerical invariants called arithmetic Hilbert…

Algebraic Geometry · Mathematics 2022-06-17 Dorian Ni

Using the Semple bundle construction, we derive an intersection-theoretic formula for the number of simultaneous contacts of specified orders between members of a generic family of degree $d$ plane curves and finitely many fixed curves. The…

alg-geom · Mathematics 2008-02-03 Susan Jane Colley , Gary Kennedy

We compute the arithmetic intersections of Hecke correspondences on the product of integral model of modular curve $\mathcal{X}_0(N)$ and relate it to the derivatives of certain Siegel Eisenstein series when $N$ is odd and squarefree. We…

Number Theory · Mathematics 2025-02-28 Qiao He , Baiqing Zhu

We study the relative Hilbert scheme of a family of nodal (or smooth) curves, over a base of arbitrary dimension, via its (birational) cycle map, going to the relative symmetric product. We show the cycle map is the blowing up of the…

Algebraic Geometry · Mathematics 2008-04-01 Ziv Ran

This paper is an elementary introduction to the theory of moduli spaces of curves and maps. As an application to enumerative geometry, we show how to count the number of bitangent lines to a projective plane curve of degree $d$ by doing…

Algebraic Geometry · Mathematics 2007-05-23 David Ayala , Renzo Cavalieri

Given an ordered sequence of $N$-choose-2 integers, we give necessary and sufficient conditions to have an ordered collection of $N$ simple closed curves on a torus such that the algebraic pairwise intersections of those curves are the…

Geometric Topology · Mathematics 2025-08-25 Ferit Öztürk

The purpose of this paper is to exhibit infinite families of conjugate projective curves in a number field whose complement have the same abelian fundamental group, but are non-homeomorphic. In particular, for any $d>3$ we find Zariski…

Algebraic Geometry · Mathematics 2019-11-28 Enrique Artal Bartolo , Jose I. Cogolludo-Agustin , Jorge Martín-Morales

We define a topological invariant of complex projective plane curves. As an application, we present new examples of arithmetic Zariski pairs.

Algebraic Geometry · Mathematics 2007-05-23 Ichiro Shimada

We establish the reciprocity law along a vertical curve for residues of differential forms on arithmetic surfaces, and describe Grothendieck's trace map of the surface as a sum of residues. Points at infinity are then incorporated into the…

Algebraic Geometry · Mathematics 2015-03-17 Matthew Morrow

Let $X$ be a complex analytic manifold, $D\subset X$ a locally quasi-homogeneous free divisor, $E$ an integrable logarithmic connection with respect to $D$ and $L$ the local system of the horizontal sections of $E$ on $X-D$. In this paper…

Algebraic Geometry · Mathematics 2007-05-23 F. J. Calderon-Moreno , L. Narvaez-Macarro

A generalization of the Kontsevich Airy-model allows one to compute the intersection numbers of the moduli space of p-spin curves. These models are deduced from averages of characteristic polynomials over Gaussian ensembles of random…

High Energy Physics - Theory · Physics 2009-05-01 E. Brezin , S. Hikami

We show how the Eulcidean algorithm for polynomials can be used to find the intersection points, with multiplicities, of two plane algebraic curves.

Algebraic Geometry · Mathematics 2009-07-03 Jan Hilmar , Chris Smyth

The local Donaldson-Thomas theory of curves is solved by localization and degeneration methods. The results complete a triangle of equivalences relating Gromov-Witten theory, Donaldson-Thomas theory, and the quantum cohomology of the…

Algebraic Geometry · Mathematics 2009-09-29 A. Okounkov , R. Pandharipande

The height of a toric variety and that of its hypersurfaces can be expressed in convex-analytic terms as an adelic sum of mixed integrals of their roof functions and duals of their Ronkin functions. Here we extend these results to the…

Algebraic Geometry · Mathematics 2024-12-24 Roberto Gualdi , Martín Sombra

We develop a formula for tautological integrals over geometric subsets of the Hilbert scheme of points on complex manifolds. As an illustration of the theory, we derive a new iterated residue formula for the number of nodal curves in…

Algebraic Geometry · Mathematics 2023-03-29 Gergely Bérczi