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arXiv research

A locally-built, LLM-digested index of recent arXiv papers in quant finance, geometry/topology, and statistical ML — keyword search served straight from SQLite on this machine.

169,341 papers · 148 categories

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102204305407 · Jun 202019922001200920182026
48 results for positive graph Lagrangians

Study on evolving graphs of functions under mean curvature flow in R^n.

problem Proving long-time existence and convergence of special Lagrangian evolution equation.
method Consider the graph of a C2C^2 function uu on Rn\mathbb{R}^n, deform it by mean curvature flow, and analyze under 2-positivity assumption.
result Proves long-time existence and convergence results under 2-positivity assumption, improving previous results.

Paper proves stability of flow in cotangent bundle for special Lagrangian submanifolds.

problem Stability of generalized Lagrangian mean curvature flow in cotangent bundle.
method New derivative estimates to weaken initial conditions and remove curvature constraints.
result Stability of flow near special Lagrangian submanifolds in cotangent bundle.

We consider the mean curvature flow of entire Lagrangian graphs with Lipschitz continuous initial data. Assuming only a certain bound on the Lipschitz norm of an initial entire Lagrangian graph in R2n\R^{2n}, we show that the parabolic equation \eqref{PMA} for the Lagrangian potential has a longtime solution which is sm…

2009-02-19abs ↗pdf ↗

We prove longtime existence and estimates for solutions to a fully nonlinear Lagrangian parabolic equation with locally C1,1C^{1,1} initial data u0u_0 satisfying either (1) (1+η)InD2u0(1+η)In-(1+η) I_n\leq D^2u_0 \leq (1+η)I_n for some positive dimensional constant ηη, (2) u0u_0 is weakly convex everywhere or (3) u0u_0 satisfies a larg…

2011-05-30abs ↗pdf ↗

Geodesics in positive Lagrangian spaces map to special Lagrangian cylinders.

problem Understanding geodesics in spaces of positive Lagrangian submanifolds.
method Cylindrical transform of geodesics, solving elliptic PDEs.
result Geodesics in positive Lagrangian spaces correspond to one-parameter families of special Lagrangian cylinders.

The paper proves optimal smoothness for certain Lagrangian graphs with specific Hölder continuity.

problem Optimal regularity for Hölder continuous Hamiltonian stationary Lagrangian graphs.
method Establishing smoothness conditions based on Hölder exponent and Lagrangian phase properties.
result Smoothness of graphs is achieved when Hölder exponent is strictly greater than 1/3 and Lagrangian phase is supercritical.

New tan-concavity property for Lagrangian phase operators helps in studying dHYM metrics.

problem Lack of concavity in Lagrangian phase operator for dHYM metrics.
method Introduce tangent Lagrangian phase flow (TLPF) on almost calibrated (1,1)-forms.
result TLPF exists for all positive time and converges to dHYM metrics under certain conditions.

The space of positive Lagrangians in an almost Calabi-Yau manifold is an open set in the space of all Lagrangian submanifolds. A Hamiltonian isotopy class of positive Lagrangians admits a natural Riemannian metric ΥΥ, which gives rise to a notion of geodesics. We study geodesics of positive On(R)O_n(\mathbb{R}) invariant…

2015-01-05abs ↗pdf ↗

Analyzes geodesics in positive Lagrangian spaces on Riemannian manifolds.

problem Analyzes geodesics in positive Lagrangian spaces on Riemannian manifolds.
method Develops analytic techniques to solve the Dirichlet problem for the Riemannian degenerate special Lagrangian equation.
result Continuous geodesics in the space of positive Lagrangians are governed by the Riemannian DSL.

This paper explores the relationship between the existence of an exact embedded Lagrangian filling for a Legendrian knot in the standard contact $\rr^3$ and the hierarchy of positive, strongly quasi-positive, and quasi-positive knots. On one hand, results of Eliashberg and especially Boileau and Orevkov show that every…

2013-07-29abs ↗pdf ↗

Study shows how to preserve Lagrangian condition in mean curvature flow on Kim-McCann metrics.

problem Preserving Lagrangian condition in mean curvature flow on Kim-McCann metrics.
method Expressed mean curvature flow within generalized mean curvature flow framework.
result Lagrangian condition is preserved along the flow.

A Lagrangian submanifold in an almost Calabi-Yau manifold is called positive if the real part of the holomorphic volume form restricted to it is positive. An exact isotopy class of positive Lagrangian submanifolds admits a natural Riemannian metric. We compute the Riemann curvature of this metric and show all sectional…

2013-01-28abs ↗pdf ↗

Study on radial solutions in higher dimensions, finding special cases.

problem Analyzing radial solutions to Hamiltonian stationary equations in various dimensions.
method Examined smooth radial solutions defined away from the origin, focusing on dimensions two and higher.
result In higher dimensions, non-special Lagrangian radial solutions exist near the origin, with continuity conditions.

The paper studies mean curvature flow of Lagrangian graphs in pseudo-Euclidean space.

problem Mean curvature flow of Lagrangian graphs in pseudo-Euclidean space.
method Analyzes the parabolic equation and Monge-Ampère type equation, proving smooth solutions and convergence to self-expanding solutions.
result Smooth solutions u(x,t)u(x,t) for specific nonlinear equations and convergence to self-expanding solutions.

Continues study on special Lagrangian graphs and flow solutions.

problem Long time existence and convergence of a class of fully nonlinear flows.
method Analyzes special Lagrangian graphs with prescribed second boundary conditions.
result Long time existence and convergence for a family of special Lagrangian graphs.

Minimal Lagrangians in certain curved spaces are stable under specific flows.

problem Stability of minimal Lagrangians in Kähler-Einstein manifolds of non-positive curvature.
method Proved stability under Lagrangian mean curvature flow.
result Equivalence between linear and dynamical stability for C1C^1-close Lagrangians.

A new Lagrangian method for graph neural networks accelerates state computation.

problem Efficiently computing states in graph neural networks for complex data.
method Lagrangian optimization for state convergence in graph neural networks.
result The proposed method accelerates state computation without iterative phases.

Let Ωand \tildeΩ be uniformly convex domains in \mathbb{R}^n with smooth boundary. We show that there exists a diffeomorphism f: Ω\to \tildeΩ such that the graph Σ= \{(x,f(x)): x \in Ω\} is a minimal Lagrangian submanifold of \mathbb{R}^n \times \mathbb{R}^n.

2008-05-23abs ↗pdf ↗

We derive a Bernstein type result for the special Lagrangian equation, namely, any global convex solution must be quadratic. In terms of minimal surfaces, the result says that any global minimal Lagrangian graph with convex potential must be a hyper-plane.

2002-01-20abs ↗pdf ↗

The paper proves a Liouville theorem for special Lagrangian equations with convexity conditions.

problem Proving Liouville theorems for special Lagrangian equations with specific conditions.
method Using Neumann-Poincaré inequality, mean value inequality for superharmonic functions, and geometric measure theory.
result Derives global and interior Hessian estimates for solutions of special Lagrangian equations.

The paper connects Legendrian links to cluster algebras via microlocal methods.

problem Understanding the relationship between Legendrian links and cluster algebras.
method Microlocal parallel transport of sheaf quantizations of Lagrangian fillings.
result Existence of quasi-cluster A\mathcal{A}-structures and cluster Poisson structures.

Develops a method to construct entire minimal graphs of odd dimensions.

problem Constructing entire minimal graphs of odd dimensions and arbitrary codimensions.
method Evolving-plane ansatz reducing minimal surface system to geodesic equation on Grassmannian.
result Yields a rich family of explicit entire minimal graphs of odd dimension and arbitrary codimension.

In this note we show that the Lagrangian Luttinger surgery preserves the symplectic Kodaira dimension. Some constraints on Lagrangian tori in symplectic four manifolds with non-positive Kodaira dimension are also derived.

2011-08-02abs ↗pdf ↗

Sp(n)-instantons linked to complex Lagrangian graphs via Fourier-Mukai transform.

problem Understanding Sp(n)-instantons on hyperkahler manifolds with conical singularities.
method Relating Sp(n)-instantons to deformed instantons and studying their properties on hyperkahler manifolds.
result Sp(n)-instantons on hyperkahler manifolds correspond to tri-contact instantons on the 3-Sasakian link.

The study explores surgeries on Lagrangian skeleta in 4-manifolds, connecting geometric and algebraic structures.

problem Understanding the combinatorics of exact Lagrangian surfaces in 4-manifolds.
method Analyzes surgeries on Lagrangian skeleta and their impact on the Fukaya category and cluster transformations.
result Induces cluster transformations on spaces of local systems and higher rank local systems.