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We prove Homological Mirror Symmetry for a smooth d-dimensional Calabi-Yau hypersurface in projective space, for any d > 2 (for example, d = 3 is the quintic three-fold). The main techniques involved in the proof are: the construction of an…

Symplectic Geometry · Mathematics 2016-12-06 Nicholas Sheridan

We describe various approaches to understanding Fukaya categories of cotangent bundles. All of the approaches rely on introducing a suitable class of noncompact Lagrangian submanifolds. We review the work of Nadler-Zaslow (math/0604379,…

Symplectic Geometry · Mathematics 2007-09-26 Kenji Fukaya , Paul Seidel , Ivan Smith

Let M be a compact Sasakian manifold. We show that M admits a CR-embedding into a Sasakian manifold diffeomorphic to a sphere, and this embedding is compatible with the respective Reeb fields. We argue that a stronger embedding theorem…

Differential Geometry · Mathematics 2007-10-25 Liviu Ornea , Misha Verbitsky

Fix g>1. Every graph of large enough tree-width contains a g x g grid as a minor; but here we prove that every four-edge-connected graph of large enough tree-width contains a g x g grid as an immersion (and hence contains any fixed graph…

Combinatorics · Mathematics 2013-08-06 Maria Chudnovsky , Zdeněk Dvořák , Tereza Klimošová , Paul Seymour

We show that singular Riemannian foliations, or, more generally, manifold submetries, defined on a compact normal homogeneous space, have algebraic nature. Moreover, in this case there exists a one-to-one correspondence between algebras of…

Differential Geometry · Mathematics 2025-12-19 Samuel Lin , Ricardo A. E. Mendes , Marco Radeschi

A log symplectic manifold is a complex manifold equipped with a complex symplectic form that has simple poles on a hypersurface. The possible singularities of such a hypersurface are heavily constrained. We introduce the notion of an…

Algebraic Geometry · Mathematics 2019-02-20 Brent Pym

We construct a symmetric monoidal category $LIE^{MC}$ whose objects are shifted L-infinity algebras equipped with a complete descending filtration. Morphisms of this category are "enhanced" infinity morphisms between shifted L-infinity…

Category Theory · Mathematics 2016-01-11 Vasily A. Dolgushev , Christopher L. Rogers

We prove that a very general cubic fourfold containing a plane can be embedded into a holomorphic symplectic eightfold as a Lagrangian submanifold. We construct the desired holomorphic symplectic eightfold as a moduli space of Bridgeland…

Algebraic Geometry · Mathematics 2014-07-29 Genki Ouchi

The SYZ Conjecture explains Mirror Symmetry between mirror Calabi-Yau 3-folds M,M' in terms of special Lagrangian fibrations f : M --> B and f' : M' --> B over the same base B, whose fibres are dual 3-tori, except for singular fibres. One…

Differential Geometry · Mathematics 2007-05-23 Dominic Joyce

Given a Lagrangian submanifold $L$ in a symplectic manifold $X$, the homological Lagrangian monodromy group $\mathcal{H}_L$ describes how Hamiltonian diffeomorphisms of $X$ preserving $L$ setwise act on $H_*(L)$. We begin a systematic study…

Symplectic Geometry · Mathematics 2024-05-09 Marcin Augustynowicz , Jack Smith , Jakub Wornbard

This paper studies the self-Floer theory of a monotone Lagrangian submanifold $L$ of a symplectic manifold $X$ in the presence of various kinds of symmetry. First we suppose $L$ is $K$-homogeneous and compute the image of low codimension…

Symplectic Geometry · Mathematics 2019-04-15 Jack Smith

To a noncompact orientable surface with no closed boundary, we associate the sum of Fukaya categories of (Liouville sectors associated to) its symmetric powers. We construct sectorial covers with the combinatorics of the bar resolution to…

Symplectic Geometry · Mathematics 2026-04-02 Vivek Shende , Peng Zhou

In mirror symmetry, symplectic Landau-Ginzburg models are mirror to a large class of examples, in particular to Fano varieties and hypersurfaces of many Calabi-Yau and Fano varieties. When studying their Fukaya categories on the A-model in…

Symplectic Geometry · Mathematics 2025-10-29 Haniya Azam , Catherine Cannizzo , Heather Lee , Chiu-Chu Melissa Liu

We upgrade the classical operation of \textit{isomonodromic deformations} along a path $\gamma$ to a functor $\mathbb{P}_{\gamma}$ between categories of flat connections with logarithmic singularities along a divisor $D$, which itself…

Algebraic Geometry · Mathematics 2025-12-08 Waleed Qaisar

We relate the version of rational Symplectic Field Theory for exact Lagrangian cobordisms introduced in [5] with linearized Legendrian contact homology. More precisely, if $L\subset X$ is an exact Lagrangian submanifold of an exact…

Symplectic Geometry · Mathematics 2009-02-26 Tobias Ekholm

Let $M_1$ and $M_2$ be special Lagrangian submanifolds of a compact Calabi-Yau manifold $X$ that intersect transversely at a single point. We can then think of $M_1\cup M_2$ as a singular special Lagrangian submanifold of $X$ with a single…

Differential Geometry · Mathematics 2007-05-23 Dan A. Lee

In this note a functorial approach to the integration problem of an LA-groupoid to a double Lie groupoid is discussed. To do that, we study the notions of fibred products in the categories of Lie groupoids and Lie algebroids, giving…

Differential Geometry · Mathematics 2009-02-13 Luca Stefanini

Let U be a real form of a complex semisimple Lie group, and tau, sigma, a pair of commuting involutions on U. This data corresponds to a reflective submanifold of a symmetric space, U/K. We define an associated integrable system, and…

Differential Geometry · Mathematics 2007-10-06 David Brander

One approach to studying the dynamics of a singular Lagrangian system is to attempt to regularize it, that is, to find an equivalent and regular system. In the case of time-independent singular Lagrangians, an approach due to \textit{A.…

Differential Geometry · Mathematics 2026-03-26 Manuel De León , Rubén Izquierdo-López , Luca Schiavone , Pablo Soto

Let $Ham (M,\omega ) $ denote the Frechet Lie group of Hamiltonian symplectomorphisms of a monotone symplectic manifold $(M, \omega) $. Let $NFuk (M, \omega)$ be the $A _{\infty} $-nerve of the Fukaya category $Fuk (M, \omega)$, and let…

Symplectic Geometry · Mathematics 2023-01-20 Yasha Savelyev