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We define Gromov--Witten invariants of exploded manifolds. The technical heart of this paper is a construction of a virtual fundamental class $[\mathcal K]$ of any Kuranishi category $\mathcal K$ (which is a simplified, more general version…

Symplectic Geometry · Mathematics 2019-06-26 Brett Parker

We give an exposition and generalization of Orlov's theorem on graded Gorenstein rings. We show the theorem holds for non-negatively graded rings which are Gorenstein in an appropriate sense and whose degree zero component is an arbitrary…

Algebraic Geometry · Mathematics 2015-07-06 Jesse Burke , Greg Stevenson

Let $\ix$ be a smooth Deligne-Mumford stack over the complex numbers. One can define twisted orbifold Gromov-Witten invariants of $\ix$ by considering multiplicative invertible characteristic classes of various bundles on the moduli spaces…

Algebraic Geometry · Mathematics 2016-07-15 Valentin Tonita

For a smooth projective curve, we derive a closed formula for the generating series of its Gromov--Witten invariants in genus $g$ and degree zero. It is known that the calculation of these invariants can be reduced to that of the…

Algebraic Geometry · Mathematics 2023-08-31 Di Yang

The local Gromov-Witten theory of curves is solved by localization and degeneration methods. Localization is used for the exact evaluation of basic integrals in the local Gromov-Witten theory of P^1. A TQFT formalism is defined via…

Algebraic Geometry · Mathematics 2009-09-29 Jim Bryan , Rahul Pandharipande

In this article we propose a definition of super Gromov-Witten invariants by postulating a torus localization property for the odd directions of the moduli spaces of super stable maps and super stable curves of genus zero. That is, we…

Algebraic Geometry · Mathematics 2023-11-16 Enno Keßler , Artan Sheshmani , Shing-Tung Yau

We study moduli spaces of twisted maps to a smooth pair in arbitrary genus, and give geometric explanations for previously known comparisons between orbifold and logarithmic Gromov--Witten invariants. Namely, we study the space of twisted…

Algebraic Geometry · Mathematics 2025-01-28 Robert Crumplin

We compute the degree of the variety parametrizing rational ruled surfaces of degree d in the projective space by relating the problem to Gromov-Witten invariants and Quantum cohomology.

Algebraic Geometry · Mathematics 2007-05-23 Cristina Martinez Ramirez

We propose an intersection-theoretic method to reduce questions in genus zero logarithmic Gromov-Witten theory to questions in the Gromov-Witten theory of smooth pairs, in the presence of positivity. The method is applied to the enumerative…

Algebraic Geometry · Mathematics 2022-01-25 Navid Nabijou , Dhruv Ranganathan

A moduli space of stable maps to the fibers of a fiber bundle is constructed. The new moduli space is a family version of the classical moduli space of stable maps to a non-singular complex projective variety. The virtual cycle for this…

Algebraic Geometry · Mathematics 2025-06-10 Indranil Biswas , Nilkantha Das , Jeongseok Oh , Anantadulal Paul

In this paper we exploit the geometric approach to the virtual fundamental class, due to Fukaya-Ono and Li-Tian, to compare the virtual fundamental classes of stable maps to a symplectic manifold and a symplectic submanifold whenever all…

Symplectic Geometry · Mathematics 2010-04-21 A. Zinger

Here we review background in differential topology related to the calculation of an euler characteristic, and background on localization in equivariant cohomology. We then outline Gromov-Witten invariants in algebraic geometry and give…

General Mathematics · Mathematics 2025-01-08 Reginald Anderson

Let V be a vector space with a nondegenerate symmetric form and OG be the orthogonal Grassmannian which parametrizes maximal isotropic subspaces in V. We give a presentation for the (small) quantum cohomology ring QH^*(OG) and show that its…

Algebraic Geometry · Mathematics 2007-05-23 Andrew Kresch , Harry Tamvakis

Virtual knot theory, introduced by Kauffman, is a generalization of classical knot theory of interest because its finite-type invariant theory is potentially a topological interpretation of Etingof and Kazhdan's theory of quantization of…

Geometric Topology · Mathematics 2012-09-21 Karene Chu

We compute the Gromov-Witten potential at all genera of target smooth Riemann surfaces using Symplectic Field Theory techniques and establish differential equations for the full descendant potential. This amounts to impose (and possibly…

Symplectic Geometry · Mathematics 2008-11-26 Paolo Rossi

We consider the problem of enumerating maps $f$ of degree $d$ from a fixed general curve $C$ of genus $g$ to $\mathbb{P}^r$ satisfying incidence conditions of the form $f(p_i)\in X_i$, where $p_i\in C$ are general points and…

Algebraic Geometry · Mathematics 2024-09-05 Carl Lian

K-theoretic Gromov-Witten invariants of a compact Kahler manifold $X$ are defined as super-dimensions of sheaf cohomology of interesting bundles over moduli spaces of n-pointed holomorphic curves in X. With this article, we begin a series…

Algebraic Geometry · Mathematics 2015-08-12 Alexander Givental

We study the fix point components of the big torus action on the moduli space of stable maps into a smooth projective toric variety, and apply Graber and Pandharipande's localization formula for the virtual fundamental class to obtain an…

Algebraic Geometry · Mathematics 2009-09-25 Holger Spielberg

For a nonsingular projective 3-fold $X$, we define integer invariants virtually enumerating pairs $(C,D)$ where $C\subset X$ is an embedded curve and $D\subset C$ is a divisor. A virtual class is constructed on the associated moduli space…

Algebraic Geometry · Mathematics 2019-12-05 R. Pandharipande , R. P. Thomas

We study K-theoretic Gromov--Witten invariants of projective hypersurfaces using a virtual localization formula under finite group actions. In particular, it provides all K-theoretic Gromov--Witten invariants of the quintic threefold modulo…

Algebraic Geometry · Mathematics 2023-12-13 Jérémy Guéré