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We derive formulas for the mean curvature of special Lagrangian 3-folds in the general case where the ambient 6-manifold has intrinsic torsion. Consequently, we are able to characterize those SU(3)-structures for which every special…

Differential Geometry · Mathematics 2020-12-23 Gavin Ball , Jesse Madnick

The purpose of this note is to scrutinize the proof of Burago and Zalgaller regarding the existence of $PL$ isometric embeddings of $PL$ compact surfaces into $\mathbb{R}^3$. We conclude that their proof does not admit a direct extension to…

Differential Geometry · Mathematics 2010-09-30 Emil Saucan

This paper contains a detailed, self contained and more streamlined proof of our $l^2$ decoupling theorem for hypersurfaces.

Classical Analysis and ODEs · Mathematics 2016-11-15 Jean Bourgain , Ciprian Demeter

We give a new proof of a version of the main theorem of the previous paper in the series about embedding of an algebraic system into ultraproducts.

Rings and Algebras · Mathematics 2022-11-15 Pasha Zusmanovich

Associated to an embedded surface in the $3$-sphere, we construct a diagram of fundamental groups, and prove that it is a complete invariant, wherefrom we deduce complete invariants of handlebody links, tunnels of handlebody links, and…

Geometric Topology · Mathematics 2021-03-09 Giovanni Bellettini , Maurizio Paolini , Yi-Sheng Wang

We show that a smooth embedding of a closed 3-manifold in S^3 x R can be isotoped so that every generic level divides S^3 x t into two handlebodies (i.e., is Heegaard) provided the original embedding has a unique local maximum with respect…

Geometric Topology · Mathematics 2014-04-23 Ian Agol , Michael H. Freedman

We define an equivariant Lagrangian Floer theory for Lagrangian torus fibers in a compact symplectic toric manifold equipped with a subtorus action. We show that the set of all Lagrangian torus fibers with weak bounding cochain data whose…

Symplectic Geometry · Mathematics 2023-11-01 Yao Xiao

We give necessary and sufficient conditions for a semi-Riemannian manifold of arbitrary signature to be locally isometrically immersed into certain warped products. Then, we describe a way to use the structure equations of such immersions…

Differential Geometry · Mathematics 2015-05-20 Marie-Amelie Lawn , Miguel Ortega

This article grew out of an effort to understand the smooth mapping class groups of certain 4-manifolds in a geometric manner. We prove a smooth analog of the Birman-Hilden theorem for manifolds that admit a hyperk\"ahler structure. This…

Geometric Topology · Mathematics 2025-02-03 Sidhanth Raman

The existence of closed hypersurfaces of prescribed scalar curvature in globally hyperbolic Lorentzian manifolds is proved provided there are barriers.

Differential Geometry · Mathematics 2007-05-23 Claus Gerhardt

Motivated by $G_2$-manifolds with coassociative fibrations in the adiabatic limit, Donaldson and Scaduto conjectured the existence of associative submanifolds homeomorphic to a three-holed $3$-sphere with three asymptotically cylindrical…

Differential Geometry · Mathematics 2026-04-29 Saman Habibi Esfahani , Yang Li

We find new obstructions on the topology of monotone Lagrangian submanifolds of $C^{n}$ under some hypothesis on the homology of their universal cover. In particular we show that nontrivial connected sums of manifolds of odd dimensions do…

Symplectic Geometry · Mathematics 2012-06-14 Mihai Damian

In this paper, we prove various results on the topology of the Grassmannian of oriented 3-planes in Euclidean 6-space and compute its cohomology ring. We give self-contained proofs. These spaces come up when studying submanifolds of…

Algebraic Topology · Mathematics 2019-04-10 Mustafa Kalafat , Eyüp Yalçınkaya

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 obtain explicit solutions of the mean curvature flow in some submanifolds of the Euclidean space. We give particularly an explicit solution of the flow of a hypersurface in the Lagrangian self-expander $L$ which is constructed in the…

Differential Geometry · Mathematics 2015-03-10 Hiroshi Nakahara

We prove a correspondence theorem for singular tropical surfaces in real three space, which recovers singular algebraic surfaces in an appropriate toric three-fold that tropicalize to a given singular tropical surface. Furthermore, we…

Algebraic Geometry · Mathematics 2018-08-24 Hannah Markwig , Thomas Markwig , Eugenii Shustin

We prove the existence of closed hypersurfaces of prescribed scalar curvature in globally hyperbolic Lorentzian manifolds provided there are barriers.

Differential Geometry · Mathematics 2016-02-26 Christian Enz

We prove analogues of several well-known results concerning rational morphisms between quadrics for the class of so-called quasilinear $p$-hypersurfaces. These hypersurfaces are nowhere smooth over the base field, so many of the geometric…

Algebraic Geometry · Mathematics 2013-11-19 Stephen Scully

We prove a homological mirror symmetry result for maximally degenerating families of hypersurfaces in $(\mathbb{C}^*)^n$ (B-model) and their mirror toric Landau-Ginzburg A-models. The main technical ingredient of our construction is a…

Symplectic Geometry · Mathematics 2024-10-30 Mohammed Abouzaid , Denis Auroux

This paper is the fifth and final in a series on embedded minimal surfaces. Following our earlier papers on disks, we prove here two main structure theorems for non-simply connected embedded minimal surfaces of any given fixed genus. The…

Differential Geometry · Mathematics 2012-11-21 Tobias H. Colding , William P. Minicozzi
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