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We investigate the geometric properties of marginally trapped surfaces (surfaces which have null mean curvature vector) in the spaces of oriented geodesics of Euclidean 3-space and hyperbolic 3-space, endowed with their canonical neutral…

Differential Geometry · Mathematics 2017-11-30 Brendan Guilfoyle , Nikos Georgiou

Gross and Siebert identified a class of singular Lagrangian torus fibrations which arise when smoothing toroidal degenerations, and which come in pairs that are related by mirror symmetry. We identify an immersed Lagrangian in each of these…

Symplectic Geometry · Mathematics 2021-07-13 Mohammed Abouzaid , Zachary Sylvan

We study the following quantitative phenomenon in symplectic topology: In many situations, if a Lagrangian cobordism is sufficiently small (in a sense specified below) then its topology is to a large extend determined by its boundary. This…

Symplectic Geometry · Mathematics 2019-03-20 Mads R. Bisgaard

We explore a number of examples of special Lagrangian fibrations on non-compact Calabi-Yau manifolds invariant under torus actions. These include fibrations on crepant resolutions of canonical toric singularities (already found by…

Algebraic Geometry · Mathematics 2007-05-23 Mark Gross

We exhibit a transformation taking special Lagrangian submanifolds of a Calabi-Yau together with local systems to vector bundles over the mirror manifold with connections obeying deformed Hermitian-Yang-Mills equations. That is, the…

Differential Geometry · Mathematics 2007-05-23 Naichung Conan Leung , Shing-Tung Yau , Eric Zaslow

We study a cylindrical Lagrangian cobordism group for Lagrangian torus fibres in symplectic manifolds which are the total spaces of smooth Lagrangian torus fibrations. We use ideas from family Floer theory and tropical geometry to obtain…

Symplectic Geometry · Mathematics 2020-09-18 Nick Sheridan , Ivan Smith

We introduce a new way to encode semicyclic structures using a stack of broken cycles. (We also prove an analogue for paracyclic structures.) This was motivated not only by higher algebra but also by Fukaya-categorical considerations. We…

Algebraic Topology · Mathematics 2019-07-09 Hiro Lee Tanaka

Let M be a complete hyperbolic 3-manifold of finite volume that admits a decomposition into right-angled ideal polyhedra. We show that M has a deformation retraction that is a virtually special square complex, in the sense of Haglund and…

Geometric Topology · Mathematics 2010-06-02 Eric Chesebro , Jason DeBlois , Henry Wilton

We prove one direction of homological mirror symmetry for complete intersections in algebraic tori, in all dimensions. The mirror geometry is not a space but a LG model, i.e. a pair given by a space and a regular function. We show that the…

Symplectic Geometry · Mathematics 2024-05-21 Hayato Morimura , Nicolò Sibilla , Peng Zhou

We show the existence of special Lagrangian tori on one family of Borcea-Voisin threefolds. We also construct a family of special Lagrangian submanifolds on the total space of the canonical line bundle of projective spaces.

Differential Geometry · Mathematics 2007-05-23 Peng Lu

The Clifford torus is a torus in a three-dimensional sphere. Homogeneous tori are simple generalization of the Clifford torus which still in a three-dimensional sphere. There is a way to construct tori in a three-dimensional sphere using…

Differential Geometry · Mathematics 2015-02-20 Katsuhiro Moriya

For a stopped Liouville manifold arising from a Liouville sector, we construct a symplectic analogue of the formal neighborhood of the stop on the level of Fukaya categories. This geometric construction is performed via Floer-theoretic…

Symplectic Geometry · Mathematics 2024-09-24 Yuan Gao

Let $(X,\check{X})$ be a mirror pair of a complex torus $X$ and its mirror partner $\check{X}$. This mirror pair is described as the trivial special Lagrangian torus fibrations $X\rightarrow B$ and $\check{X}\rightarrow B$ on the same base…

Differential Geometry · Mathematics 2023-03-01 Kazushi Kobayashi

We prove the surprising fact that the infinity-category of stabilized Liouville sectors is a localization of an ordinary category of stabilized Liouville sectors and strict sectorial embeddings. From the perspective of homotopy theory, this…

Symplectic Geometry · Mathematics 2022-10-31 Oleg Lazarev , Zachary Sylvan , Hiro Lee Tanaka

This is the sixth in a series of papers constructing examples of special Lagrangian m-folds in C^m. We present a construction of special Lagrangian cones in C^3 involving two commuting o.d.e.s, motivated by the first two papers of the…

Differential Geometry · Mathematics 2008-11-17 Dominic Joyce

We prove that certain Riemannian manifolds can be isometrically embedded inside Calabi-Yau manifolds. For example we prove that given any real-analytic one parameter family of Riemannian metrics $g_t$ on a 3-dimensional manifold $Y$ with…

Differential Geometry · Mathematics 2007-05-23 Diego Matessi

Given a lattice polytope $Q\subset \mathbb{R}^n$, we can consider the cone $\sigma=C(Q)=\{\lambda(q,1)\in \mathbb{R}^{n+1}|\lambda \in \mathbb{R}_{\geq0}, q\in Q\} \subset \mathbb{R}^{n+1}$, and the affine toric variety $Y_{\sigma}$…

Symplectic Geometry · Mathematics 2024-05-07 Santiago Achig-Andrango

Given two locally conformal symplectic (LCS) structures on manifolds $M_1$ and $M_2$, we construct a natural $\R^+$-torsor of locally conformal symplectic structures on a certain covering space $M_1 \boxplus M_2$ of $M_1 \times M_2$. As the…

Symplectic Geometry · Mathematics 2024-01-29 Baptiste Chantraine , Kevin Sackel

We build the wrapped Fukaya category W(E) for any monotone symplectic manifold, convex at infinity. We define the open-closed and closed open-string maps. We study their algebraic properties and prove that the string maps are compatible…

Symplectic Geometry · Mathematics 2016-09-22 Alexander F. Ritter , Ivan Smith

We prove that a 3-dimensional hyperbolic cusp with convex polyhedral boundary is uniquely determined by the metric induced on its boundary. Furthemore, any hyperbolic metric on the torus with cone singularities of positive curvature can be…

Differential Geometry · Mathematics 2014-11-11 François Fillastre , Ivan Izmestiev