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This paper explores the relationship between closed curves on surfaces and their intersections. Like Dehn-Thurston coordinates for simple curves, we explore how to determine closed curves using the number of times they intersect other…

Geometric Topology · Mathematics 2023-08-29 Hugo Parlier , Binbin Xu

We derive conjectures, called genus 1 Enumerative mirror symmetry for moduli spaces of Higgs bundles, which relate curve-counting invariants of moduli spaces of Higgs $\mathrm{SL}_r$-bundles to curve-counting invariants of moduli spaces of…

Algebraic Geometry · Mathematics 2023-06-28 Denis Nesterov

The main goal of the paper is to present a new approach via Hurwitz numbers to Kontsevich's combinatorial/matrix model for the intersection theory of the moduli space of curves. A secondary goal is to present an exposition of the circle of…

Algebraic Geometry · Mathematics 2007-05-23 Andrei Okounkov , Rahul Pandharipande

This paper announces results on the behavior of some important algebraic and topological invariants --- Euler characteristic, arithmetic genus, and their intersection homology analogues; the signature, etc. --- and their associated…

Algebraic Geometry · Mathematics 2009-09-25 Sylvain E. Cappell , Julius L. Shaneson

An algorithm to determine all the Gromov-Witten invariants of any smooth projective curve was obtained by Okounkov and Pandharipande in 2006. They identified stationary invariants with certain Hurwitz numbers and then presented Virasoro…

Algebraic Geometry · Mathematics 2022-05-26 Alexandr Buryak

We construct invariants for any closed semipositive symplectic manifold which count rational curves satisfying tangency constraints to a local divisor. More generally, we introduce invariants involving multibranched local tangency…

Symplectic Geometry · Mathematics 2021-10-20 Dusa McDuff , Kyler Siegel

We construct an invariant of 3-manifolds using a modification of the Kontsevich integral and Kirby's calculus. This invariant, as expected in perturbative Chern-Simon theory, takes values in the algebra of oriented 3-valent graphs. This…

q-alg · Mathematics 2008-02-03 Thang T. Q. Le , Jun Murakami , Tomotada Ohtsuki

We prove that stationary Gromov-Witten invariants of $\bp^1$ arise as the Eynard-Orantin invariants of the spectral curve $x=z+1/z$, $y=\ln{z}$. As an application we show that tautological intersection numbers on the moduli space of curves…

Algebraic Geometry · Mathematics 2014-11-11 Paul Norbury , Nick Scott

We construct an invariant of parametrized generic real algebraic surfaces in RP^3 which generalizes the Brown invariant of immersed surfaces from smooth topology. The invariant is constructed using the self intersection, which is a real…

Geometric Topology · Mathematics 2015-05-30 Johan Björklund

We consider a family of compact manifolds which shrinks with respect to an appropriate parameter to a graph. The main result is that the spectrum of the Laplace-Beltrami operator converges to the spectrum of the (differential) Laplacian on…

Mathematical Physics · Physics 2020-01-30 Pavel Exner , Olaf Post

The celebrated Erdos, Faber and Lovasz conjecture may be stated as follows: Any linear hypergraph on v points has chromatic index at most v. We will introduce the linear intersection number of a graph, and use this number to give an…

Combinatorics · Mathematics 2007-05-23 Hauke Klein , Marian Margraf

We propose an alternative variational principle whose critical point is the algebraic plane curve associated to a matrix model (the spectral curve, i.e. the large $N$ limit of the resolvent). More generally, we consider a variational…

High Energy Physics - Theory · Physics 2014-08-01 B. Eynard

We derive various inequalities involving the intersection number of the curves contained in geodesics and tight geodesics in the curve graph. While there already exist such inequalities on tight geodesics, our method applies in the setting…

Geometric Topology · Mathematics 2016-03-14 Yohsuke Watanabe

Mirror symmetry relates Gromov-Witten invariants of an elliptic curve with certain integrals over Feynman graphs. We prove a tropical generalization of mirror symmetry for elliptic curves, i.e., a statement relating certain labeled…

Algebraic Geometry · Mathematics 2018-10-18 Janko Boehm , Kathrin Bringmann , Arne Buchholz , Hannah Markwig

We present a series of new results we obtained recently about the intersection numbers of tautological classes on moduli spaces of curves, including a simple formula of the n-point functions for Witten's $\tau$ classes, an effective…

Algebraic Geometry · Mathematics 2011-03-31 Kefeng Liu , Hao Xu

We describe local mirror symmetry from a mathematical point of view and make several A-model calculations using the mirror principle (localization). Our results agree with B-model computations from solutions of Picard-Fuchs differential…

High Energy Physics - Theory · Physics 2009-09-25 T. -M. Chiang , A. Klemm , S. -T. Yau , E. Zaslow

Due to the orbifold singularities, the intersection numbers on the moduli space of curves $\bar{\sM}_{g,n}$ are in general rational numbers rather than integers. We study the properties of the denominators of these intersection numbers and…

Algebraic Geometry · Mathematics 2011-03-22 Kefeng Liu , Hao Xu

For a compact connected Riemannian manifold with smooth boundary, we establish an effective procedure, by which we can calculate all the coefficients of the spectral asymptotic formula of the Dirichlet-to-Neumann map associated to the…

Differential Geometry · Mathematics 2025-01-14 Xiaoming Tan

We present an enhanced algorithm for exploring mirror symmetry for elliptic curves through the correspondence of algebraic and tropical geometry, focusing on Gromov-Witten invariants of elliptic curves and, in particular, Hurwitz numbers.…

Algebraic Geometry · Mathematics 2023-11-21 Firoozeh Aga , Janko Boehm , Alain Hoffmann , Hannah Markwig , Ali Traore

We address the problem of computing bounds for the self-intersection number (the minimum number of self-intersection points) of members of a free homotopy class of curves in the doubly-punctured plane as a function of their combinatorial…

Geometric Topology · Mathematics 2010-01-27 Moira Chas , Anthony Phillips