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This paper initiates a study of Hodge integrals on moduli spaces of pseudostable curves. We prove an explicit comparison formula that allows one to effectively compute any pseudostable Hodge integral in terms of intersection numbers on…

Algebraic Geometry · Mathematics 2022-01-13 Renzo Cavalieri , Joel Gallegos , Dustin Ross , Brandon Van Over , Jonathan Wise

We construct a uniformly bounded symplectic structure on $S^2 \times \mathbb{R}^4$ admitting embeddings by arbitrarily large balls. This provides a counterexample to a recent conjecture of Savelyev. We then prove the conjecture holds for a…

Symplectic Geometry · Mathematics 2025-07-16 Spencer Cattalani

In this note we give a new, natural construction of a compactification of the stack of smooth r-spin curves, which we call the stack of stable twisted $r$-spin curves. This stack is identified with a special case of a stack of twisted…

Algebraic Geometry · Mathematics 2007-05-23 Dan Abramovich , Tyler J. Jarvis

For each compact almost Kahler manifold $(X,\om,J)$ and an element A of $H_2(X;Z)$, we describe a closed subspace $\ov{\frak M}_{1,k}^0(X,A;J)$ of the moduli space $\ov{\frak M}_{1,k}(X,A;J)$ of stable J-holomorphic genus-one maps such that…

Symplectic Geometry · Mathematics 2014-11-11 Aleksey Zinger

In a previous paper we developed a regularity and compactness theory in Euclidean ambient spaces for codimension 1 weakly stable CMC integral varifolds satisfying two (necessary) structural conditions. Here we generalize this theory to the…

Differential Geometry · Mathematics 2020-10-13 Costante Bellettini , Neshan Wickramasekera

We study here some aspects of the topology of the space of smooth, stable, genus 0 curves in a Riemannian manifold $X$, i.e. the Kontsevich stable curves, which are not necessarily holomorphic. We use the Hofer-Wysocki-Zehnder polyfold…

Symplectic Geometry · Mathematics 2012-05-18 Yasha Savelyev

We study the envelopes of meromorphy of neighborhoods of symplectically immersed two-spheres in complex K\"ahler surfaces using the Gromov's theory of pseudoholomorphic curves. The construction of a complete family of holomorphic…

Complex Variables · Mathematics 2015-06-26 S. M. Ivashkovich , V. V. Shevchishin

We construct a compactification of the moduli space of twisted holomorphic maps with varying complex structure and bounded energy. For a given compact symplectic manifold $X$ with a compatible complex structure and a Hamiltonian action of…

Symplectic Geometry · Mathematics 2007-05-23 Ignasi Mundet i Riera , Gang Tian

In this paper we continue an earlier study of ends non-compact manifolds. The over-arching goal is to investigate and obtain generalizations of Siebenmann's famous collaring theorem that may be applied to manifolds having non-stable…

Geometric Topology · Mathematics 2014-11-11 C R Guilbault , F C Tinsley

Suppose $Y$ is a smooth variety equipped with a top form. We prove a simple theorem giving a sharp lower bound on the geometric genus of a family of subvarieties of $Y$, in terms of the dimension of this family. Two elementary applications…

Algebraic Geometry · Mathematics 2024-10-16 Yeuk Hay Joshua Lam , Federico Moretti , Giovanni Passeri

We extend the notion of a pseudoholomorphic vector of Iwaniec, Verchota, and Vogel to mappings between Riemannian manifolds. Since this class of mappings contains both quasiregular mappings and (pseudo)holomorphic curves, we call them…

Complex Variables · Mathematics 2020-05-05 Pekka Pankka

We generalize the notion of tight geodesics in the curve complex to tight trees. We then use tight trees to construct model geometries for certain surface bundles over graphs. This extends some aspects of the combinatorial model for doubly…

Geometric Topology · Mathematics 2020-07-08 Mahan Mj

We prove a symplectic version of a conjecture of Lian and Pandharipande: in sufficiently high degree, the fixed-domain Gromov-Witten invariants of positive symplectic manifolds are signed counts of pseudo-holomorphic curves. The original…

Symplectic Geometry · Mathematics 2025-08-05 Alessio Cela , Aleksander Doan

This manuscript studies manifolds-with-boundary collapsing in the Gromov-Hausdorff topology. The main aim is an understanding of the relationship of the topology and geometry of a limiting sequence of manifolds-with-boundary to that of a…

Differential Geometry · Mathematics 2007-11-26 Jeremy Wong

The goal of this article is to motivate and describe how Gromov-Witten theory can and has provided tools to understand the moduli space of curves. For example, ideas and methods from Gromov-Witten theory have led to both conjectures and…

Algebraic Geometry · Mathematics 2007-05-23 Ravi Vakil

We define Strebel differentials for stable complex curves, prove the existence and uniqueness theorem that generalizes Strebel's theorem for smooth curves, prove that Strebel differentials form a continuous family over the moduli space of…

Algebraic Geometry · Mathematics 2007-05-23 Dimitri Zvonkine

We prove that topological disks with positive curvature and strictly convex boundary of large length are close to round spherical caps of constant boundary curvature in the Gromov-Hausdorff sense. This proves stability for a theorem of F.…

Differential Geometry · Mathematics 2023-11-08 Hunter Stufflebeam

We prove that in a stable range, the rational cohomology of the moduli space of curves with level structures is the same as that of the ordinary moduli space of curves.

Algebraic Geometry · Mathematics 2025-06-25 Andrew Putman

This paper describes the structure of the moduli space of holomorphic curves and constructs Gromov Witten invariants in the category of exploded manifolds. This includes defining Gromov Witten invariants relative to normal crossing divisors…

Symplectic Geometry · Mathematics 2011-02-02 Brett Parker

We prove that pseudoholomorphic curves intersect complex 2-cycles positively in almost complex 4-manifolds. This makes possible a general and conceptually simple proof that an almost complex 4-manifold with many curves admits a taming…

Symplectic Geometry · Mathematics 2024-02-01 Spencer Cattalani