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In this article we study invariance properties of shift-invariant spaces in higher dimensions. We state and prove several necessary and sufficient conditions for a shift-invariant space to be invariant under a given closed subgroup of…

Classical Analysis and ODEs · Mathematics 2010-02-08 Magalí Anastasio , Carlos Cabrelli , Victoria Paternostro

We study the behaviour of rational curves tangent to a hypersurface under degenerations of the hypersurface. Working within the framework of logarithmic Gromov-Witten theory, we extend the degeneration formula to the logarithmically…

Algebraic Geometry · Mathematics 2022-10-27 Lawrence Jack Barrott , Navid Nabijou

Given a closed symplectic manifold $X$, we construct Gromov-Witten-type invariants valued both in (complex) $K$-theory and in any complex-oriented cohomology theory $\mathbb{K}$ which is $K_p(n)$-local for some Morava $K$-theory $K_p(n)$.…

Symplectic Geometry · Mathematics 2024-07-18 Mohammed Abouzaid , Mark McLean , Ivan Smith

Twisted Gromov-Witten invariants are intersection numbers in moduli spaces of stable maps to a manifold or orbifold X which depend in addition on a vector bundle over X and an invertible multiplicative characteristic class. Special cases…

Algebraic Geometry · Mathematics 2013-04-01 Tom Coates , Alessio Corti , Hiroshi Iritani , Hsian-Hua Tseng

Let $\overline{M}$ be a compact smoothly stratified pseudo-manifold endowed with a wedge metric $g$. Let $\overline{M}_\Gamma$ be a Galois $\Gamma$-covering. Under additional assumptions on $\overline{M}$, satisfied for example by Witt…

Differential Geometry · Mathematics 2024-09-12 Francesco Bei , Paolo Piazza , Boris Vertman

New relations among the genus-zero Gromov-Witten invariants of a complex projective manifold $X$ are exhibited. When the cohomology of $X$ is generated by divisor classes and classes ``with vanishing one-point invariants,'' the relations…

Algebraic Geometry · Mathematics 2007-05-23 Aaron Bertram , Holger P. Kley

In this paper, we study the all genus Gromov-Witten theory for any GKM orbifold $X$. We generalize the Givental formula which is studied in the smooth case in \cite{Giv2} \cite{Giv3} \cite{Giv4} to the orbifold case. Specifically, we…

Algebraic Geometry · Mathematics 2016-05-10 Zhengyu Zong

We study Wick-rotations of left-invariant metrics on Lie groups, using results from real GIT (\cite{1}, \cite{2}, \cite{3}). An invariant for Wick-rotation of Lie groups is given, and we describe when a pseudo-Riemannian Lie group can be…

Differential Geometry · Mathematics 2020-09-08 Christer Helleland

We study the space of Lie algebras equipped with left-invariant complex structures, $\mathcal{L}_{ J_{\tiny{\mbox{cn}}} }(\mathbb{R}^{2n}) $, with particular attention to their degenerations and deformations. To this end, we identify…

Representation Theory · Mathematics 2025-02-19 Edison Alberto Fernández-Culma , Nadina Rojas

We consider K-theoretic Gromov-Witten theory of root constructions. We calculate some genus $0$ K-theoretic Gromov-Witten invariants of a root gerbe. We also obtain a K-theoretic relative/orbifold correspondence in genus $0$.

Algebraic Geometry · Mathematics 2024-11-26 Hsian-Hua Tseng

We construct Gromov-Witten invariants of general symplectic manifolds.

alg-geom · Mathematics 2008-02-03 Jun Li , Gang Tian

In this note we introduce parameterized Gromov-Witten invariants for symplectic fiber bundles and study the topology of the symplectomorphism group. We also give sample applications showing the non-triviality of certain homotopy groups of…

Symplectic Geometry · Mathematics 2008-09-26 Hong-Van Le , Kaoru Ono

We define higher genus Gromov-Witten invariants and establish a mathematical theory of sigma model coupled with gravity over any semi-positive symplectic manifolds. As applications, we verify the stablizing conjecture of symplectic…

alg-geom · Mathematics 2009-10-28 Yongbin Ruan , Gang Tian

In this paper, we study relations among known universal equations for Gromov-Witten invariants at genus 1 and 2.

Differential Geometry · Mathematics 2007-05-23 Xiaobo Liu

In this paper, we define genus-zero relative Gromov--Witten invariants with negative contact orders. Using this, we construct relative quantum cohomology rings and Givental formalism. A version of Virasoro constraints also follows from it.

Algebraic Geometry · Mathematics 2019-11-15 Honglu Fan , Longting Wu , Fenglong You

We express all equivariant Gromov-Witten invariants of the projective line as matrix elements of explicit operators acting in the Fock space. As a consequence, we prove the equivariant theory is governed by the 2-Toda hierarchy of Ueno and…

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

We consider deformations of left-invariant complex structures on simply connected semisimple compact Lie groups which are a priori non-invariant. Computing their cohomologies, we show that they are not actually biholomorphic to…

Differential Geometry · Mathematics 2022-04-06 Hiroaki Ishida , Hisashi Kasuya

This is the second part of the project toward an effective algorithm to evaluate all genus Gromov-Witten invariants of quintic Calabi-Yau threefolds. In this paper, the localization formula is derived, and algorithms toward evaluating these…

Algebraic Geometry · Mathematics 2019-03-19 Huai-Liang Chang , Jun Li , Wei-Ping Li , Chiu-Chu Melissa Liu

We use simple geometric arguments to calculate the dimension zero local Gromov-Witten invariants of elliptic multiple fibers. This completes the calculation of all dimension zero GW invariants of elliptic surfaces with $p_g>0$.

Symplectic Geometry · Mathematics 2012-05-08 Junho Lee

We state and prove a topological recursion relation that expresses any genus-g Gromov-Witten invariant of a projective manifold with at least a (3g-1)-st power of a cotangent line class in terms of invariants with fewer cotangent line…

Algebraic Geometry · Mathematics 2007-05-23 Andreas Gathmann