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We introduce the notion of tropical Lagrangian multi-sections over a $2$-dimensional integral affine manifold $B$ with singularities, and use them to study the reconstruction problem for higher rank locally free sheaves over Calabi-Yau…

Algebraic Geometry · Mathematics 2022-03-09 Kwokwai Chan , Ziming Nikolas Ma , Yat-Hin Suen

We introduce a new construction for tropical Lagrangian surfaces in $(\mathbb{C}^*)^2$. This construction makes the surfaces special Lagrangian, which gives a strong control over the asymptotic behavior of holomorphic disks near each…

Symplectic Geometry · Mathematics 2025-07-04 Jaewon Chang

We describe the Fukaya-Seidel category of a Landau-Ginzburg model LG(2) for the semisimple adjoint orbit of sl(2,C). We prove that this category is equivalent to a full triangulated subcategory of the category of coherent sheaves on the…

Symplectic Geometry · Mathematics 2019-09-24 Edoardo Ballico , Severin Barmeier , Elizabeth Gasparim , Lino Grama , Luiz A. B. San Martin

In this note we define the notion of collarable slices of Lagrangian submanifolds. Those are slices of Lagrangian submanifolds which can be isotoped through Lagrangian submanifolds to a cylinder over a Legendrian embedding near a contact…

Symplectic Geometry · Mathematics 2013-08-22 Baptiste Chantraine

Let $(M,I,J,K,g)$ be a hyperk\"ahler manifold. Then the complex manifold $(M,I)$ is holomorphic symplectic. We prove that for all real $x, y,$ with $x^2 + y^2 = 1$ except countably many, any finite energy $(xJ+yK)$-holomorphic curve with…

Symplectic Geometry · Mathematics 2021-09-20 Jake P. Solomon , Misha Verbitsky

In this paper we give a construction of Lagrangian torus fibration for Calabi-Yau hypersurface in toric variety via the method of gradient flow. Using our construction of Lagrangian torus fibration, we are able to prove the symplectic…

Differential Geometry · Mathematics 2007-05-23 Wei-Dong Ruan

For a stably framed Liouville manifold X , we construct a "Donaldson-Fukaya category over the sphere spectrum" F(X; S). The objects are closed exact Lagrangians whose Gauss maps are nullhomotopic compatibly with the ambient stable framing,…

Symplectic Geometry · Mathematics 2024-05-21 Noah Porcelli , Ivan Smith

Let $(M,\omega_M)$ be a monotone or negatively monotone symplectic manifold, or a Weinstein manifold. One can construct an "action" of $H^1(M,\mathbb{G}_m)$ on the Fukaya category (wrapped Fukaya category in the exact case) that reflects…

Symplectic Geometry · Mathematics 2021-09-28 Yusuf Barış Kartal

We consider mirror symmetry for (essentially arbitrary) hypersurfaces in (possibly noncompact) toric varieties from the perspective of the Strominger-Yau-Zaslow (SYZ) conjecture. Given a hypersurface $H$ in a toric variety $V$ we construct…

Symplectic Geometry · Mathematics 2015-07-31 Mohammed Abouzaid , Denis Auroux , Ludmil Katzarkov

We classify holomorphic isometric actions on complex space forms all whose orbits are Lagrangian submanifolds, up to orbit equivalence. The only examples are Lagrangian affine subspace foliations of complex Euclidean spaces, and Lagrangian…

Differential Geometry · Mathematics 2021-10-13 Jose Carlos Diaz-Ramos , Miguel Dominguez-Vazquez , Takahiro Hashinaga

We identify type-preserving representations $\phi: \pi_1(\Sigma)\to \mathrm{PSL}(2,\mathbb{R})$ of the fundamental group of every punctured surface $\Sigma = \Sigma_{g,p}$ that are not Fuchsian yet send all non-peripheral simple closed…

Geometric Topology · Mathematics 2025-11-19 Inyoung Ryu

Given a Riemannian manifold $M,$ and an open interval $I\subset\mathbb{R},$ we characterize nontrivial totally umbilical hypersurfaces of the product $M\times I$ -- as well as of warped products $I\times_\omega M$ -- as those which are…

Differential Geometry · Mathematics 2021-01-05 Ronaldo F. de Lima , João Paulo dos Santos

We compute Seidel's mirror map for abelian varieties by constructing the homogeneous coordinate rings from the Fukaya category of the symplectic mirrors. The computations are feasible as only linear holomorphic disks contribute to the…

Symplectic Geometry · Mathematics 2025-02-18 Marco Aldi , Eric Zaslow

We prove that homological mirror symmetry for very affine hypersurfaces respects certain natural symplectic operations (as functors between partially wrapped Fukaya categories), verifying conjectures of Auroux. These conjectures concern…

Symplectic Geometry · Mathematics 2025-01-03 Benjamin Gammage , Maxim Jeffs

We construct examples of algebraic surfaces with interesting fundamental groups.

Algebraic Geometry · Mathematics 2007-05-23 Fedor Bogomolov , Yuri Tschinkel

In this thesis we study asymptotic behavior of projective embeddings of abelian varieties and their amoebas. The projective embeddings are given by theta functions. It is known that a Lagrangian fibration of the abelian variety determines a…

Differential Geometry · Mathematics 2007-05-23 Yuichi Nohara

We study a class of Lagrangian submanifolds, given by sections of a special Lagrangian fibration, contained in certain almost Calabi-Yau threefolds (mirrors of polarised toric threefolds satisfying suitable assumptions). We show that, for a…

Algebraic Geometry · Mathematics 2025-08-26 Jacopo Stoppa

Hamiltonian stationary Lagrangian submanifolds (HSLAG) are a natural generalization of special Lagrangian manifolds (SLAG). The latter only make sense on Calabi-Yau manifolds whereas the former are defined for any almost K\"ahler manifold.…

Differential Geometry · Mathematics 2016-06-21 Eveline Legendre , Yann Rollin

Given a symplectic manifold M, we consider a category with objects finite ordered families of Lagrangian submanifolds of M (subject to certain additional constraints) and with morphisms Lagrangian cobordisms relating them. We construct a…

Symplectic Geometry · Mathematics 2018-08-28 Paul Biran , Octav Cornea

We consider a definition of the Fukaya category of a singular hypersurface proposed by Auroux, given by localizing the Fukaya category of a nearby fiber at Seidel's natural transformation, and show that this possesses several desirable…

Symplectic Geometry · Mathematics 2025-01-03 Maxim Jeffs