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We use the tropical geometry approach to compute absolute and relative Gromov-Witten invariants of complex surfaces which are $\CC P^1$-bundles over an elliptic curve. We also show that the tropical multiplicity used to count curves can be…

Algebraic Geometry · Mathematics 2022-12-14 Thomas Blomme

We study the stationary descendant Gromov-Witten theory of toric surfaces by combining and extending a range of techniques - tropical curves, floor diagrams, and Fock spaces. A correspondence theorem is established between tropical curves…

Algebraic Geometry · Mathematics 2020-03-31 Renzo Cavalieri , Paul Johnson , Hannah Markwig , Dhruv Ranganathan

The Welschinger invariants of real rational algebraic surfaces are natural analogues of the genus zero Gromov-Witten invariants. We establish a tropical formula to calculate the Welschinger invariants of real toric Del Pezzo surfaces for…

Algebraic Geometry · Mathematics 2008-03-02 E. Shustin

We enumerate, via floor diagrams, complex and real curves in the projective plane blown up in $n$ points on a conic. As an application, we deduce Gromov-Witten and Welschinger invariants of Del Pezzo surfaces. These results are mainly…

Algebraic Geometry · Mathematics 2016-01-22 Erwan Brugalle

We discuss, following Mikhalkin, Brugall\'e, and many others, the counting of curves on toric surfaces with prescribed genus, Newton polygon, and intersection pattern with the toric boundary divisor, both at assigned and unassigned points.…

Algebraic Geometry · Mathematics 2025-11-27 Thomas Dedieu

This is a follow-up paper of arXiv:1805.00115, where rational curves in surfaces that satisfy general positioned point and cross-ratio conditions were enumerated. A suitable correspondence theorem provided in arXiv:1509.07453 allowed us to…

Algebraic Geometry · Mathematics 2020-03-24 Christoph Goldner

Floor diagrams are a class of weighted oriented graphs introduced by E. Brugalle and the second author. Tropical geometry arguments lead to combinatorial descriptions of (ordinary and relative) Gromov-Witten invariants of projective spaces…

Algebraic Geometry · Mathematics 2010-01-18 Sergey Fomin , Grigory Mikhalkin

This paper is the third installment in a series of papers devoted to the computation of enumerative invariants of abelian surfaces through the tropical approach. We develop a pearl diagram algorithm similar to the floor diagram algorithm…

Algebraic Geometry · Mathematics 2024-03-27 Thomas Blomme

We present tools and definitions to study abstract tropical manifolds in dimension 2, which we call simply tropical surfaces. This includes explicit descriptions of intersection numbers of 1-cycles, normal bundles to some curves and…

Algebraic Geometry · Mathematics 2015-06-25 Kristin Shaw

We prove that the quadratically enriched count of rational curves in a smooth toric del Pezzo surface passing through $k$-rational points and pairs of conjugate points in quadratic field extensions $k\subset k(\sqrt{d_i})$ can be determined…

Algebraic Geometry · Mathematics 2026-03-19 Andrés Jaramillo Puentes , Hannah Markwig , Sabrina Pauli , Felix Röhrle

This note presents a formula for the enumerative invariants of arbitrary genus in toric surfaces. The formula computes the number of curves of a given genus through a collection of generic points in the surface. The answer is given in terms…

Algebraic Geometry · Mathematics 2007-05-23 Grigory Mikhalkin

Since the first famous correspondence theorem by Mikhalkin appeared in 2005, tropical geometry has allowed a parallel treatment of real and complex counting problems. A prime example are the genus 0 Gromov-Witten invariants of the plane…

Algebraic Geometry · Mathematics 2026-01-21 Andrés Jaramillo Puentes , Hannah Markwig , Sabrina Pauli , Felix Röhrle

The family of complex projective surfaces in projective three space of degree $d$ having precisely $\delta$ nodes as their only singularities has codimension $\delta$ in the linear system of surfaces of degree $d$ for sufficiently large $d$…

Algebraic Geometry · Mathematics 2019-10-22 Hannah Markwig , Thomas Markwig , Kristin Shaw , Eugenii Shustin

We show that the isolated invariant branches globalize to algebraic curves, when we consider weak toric type complex hyperbolic foliations on projective toric ambient surfaces. To do it, we pass through a characterization of weak toric type…

Algebraic Geometry · Mathematics 2019-02-14 Beatriz Molina-Samper

The paper establishes a formula for enumeration of curves of arbitrary genus in toric surfaces. It turns out that such curves can be counted by means of certain lattice paths in the Newton polygon. The formula was announced earlier in…

Algebraic Geometry · Mathematics 2007-05-23 Grigory Mikhalkin

We enumerate rational curves in toric surfaces passing through points and satisfying cross-ratio constraints using tropical and combinatorial methods. Our starting point is arXiv:1509.07453, where a tropical-algebraic correspondence theorem…

Algebraic Geometry · Mathematics 2018-05-02 Christoph Goldner

Jaramillo Puentes et al. give a Grothendieck-Witt valued floor-diagram formula for rational curves in smooth toric del Pezzo surfaces with simple and quadratic double point conditions. We study its dependence on the choice of merge…

Algebraic Geometry · Mathematics 2026-05-12 Yanis Hedjem

The Welschinger invariants of real rational algebraic surfaces are natural analogues of the Gromov-Witten invariants, and they estimate from below the number of real rational curves passing through prescribed configurations of points. We…

Algebraic Geometry · Mathematics 2007-05-23 E. Shustin

Patchworking theorems serve as a basic element of the correspondence between tropical and algebraic curves, which is a core of the tropical enumerative geometry. We present a new version of a patchworking theorem which relates plane…

Algebraic Geometry · Mathematics 2009-11-01 Eugenii Shustin

Tropical counting tools are useful for many enumerative questions. We count tropical multinodal surfaces using floor plans, looking at the case when two nodes are tropically close together, i.e., unseparated. We generalize tropical floor…

Algebraic Geometry · Mathematics 2022-12-16 Madeline Brandt , Alheydis Geiger
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