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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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48 results for uniformly convex hypersurfaces

We consider compact convex hypersurfaces contracting by functions of their curvature. Under the mean curvature flow, uniformly convex smooth initial hypersurfaces evolve to remain smooth and uniformly convex, and contract to points after finite time. The same holds if the initial data is only weakly convex or non-smoot…

2011-04-05abs ↗pdf ↗

The paper studies a flow of convex hypersurfaces expanding by their support and curvature functions.

problem Analyzing the behavior of expanding hypersurfaces in Euclidean space.
method Introduced a curvature flow with specific speed function and proved the existence and convergence of the flow under certain conditions.
result The flow converges to a round sphere centered at the origin for all time under specific conditions.

The paper extends a Harnack inequality to noncompact evolving hypersurfaces.

problem Proving a Harnack inequality for noncompact evolving hypersurfaces.
method Using a differential Harnack inequality for noncompact convex hypersurfaces flowing with normal speed based on their principal curvatures.
result The extension of Andrews' result to noncompact hypersurfaces.

The paper studies curvature flows in hyperbolic space and proves convergence to spheres under certain conditions.

problem Curvature flows in hyperbolic space and their convergence properties.
method Analyzes a class of flows with specific speed functions and proves convergence under various conditions.
result The mean convex and uniformly convex solutions to the flow converge to spheres for specified conditions.

Anisotropic expanding flow of convex hypersurfaces converges to a soliton under certain conditions.

problem Anisotropic expanding curvature flows of convex hypersurfaces in Euclidean space.
method Proving the existence and convergence of a unique smooth and uniformly convex solution to the flow under specific conditions.
result The flow converges to a soliton which solves an elliptic equation when parameters are within a suitable range.

New control on diameter and curvature for evolving surfaces.

problem Controlling the diameter and curvature of evolving surfaces under mean curvature flow.
method Detailed analysis of cylindrical regions under mean curvature flow.
result Intrinsic diameter stays uniformly controlled as surfaces approach first singular time.

Unified flow solves LpL^p Christoffel-Minkowski problem for p>1p>1.

problem Solving the LpL^p Christoffel-Minkowski problem for p>1p>1.
method Anisotropic expanding flow of smooth hypersurfaces with speed ψσk(λ)αψσ_k(λ)^α.
result The flow converges to a solution of the LpL^p Christoffel-Minkowski problem.

We prove that convex hypersurfaces in Rn+1{\mathbb R}^{n+1} contracting under the flow by any power α>1n+2α>\frac{1}{n+2} of the Gauss curvature converge (after rescaling to fixed volume) to a limit which is a smooth, uniformly convex self-similar contracting solution of the flow. Under additional central symmetry of the ini…

2015-10-02abs ↗pdf ↗

The paper introduces a new flow to converge to a Wulff shape from a smooth convex hypersurface.

problem Proving Alexandrov-Fenchel inequalities for anisotropic mixed volumes.
method Introducing a fully nonlinear locally constrained anisotropic curvature flow.
result The flow converges smoothly and exponentially to a scaled Wulff shape.

This paper solves the Christoffel problem in hyperbolic space and its equivalent on spheres.

problem Prescribing curvatures for convex hypersurfaces in hyperbolic space.
method Proving a full rank theorem to establish the existence of solutions.
result Existence of solutions to the Christoffel problem and its equivalent Nirenberg-Kazdan-Warner problem on spheres.

The paper studies curvature flows of star-shaped hypersurfaces and proves convergence to spheres.

problem Analyzing the convergence of a class of anisotropic curvature flows.
method Using new auxiliary functions, the paper studies a class of flows with specific speed and proves convergence under certain conditions.
result The kk-convex solution to the flow converges smoothly to a sphere after normalization for specific values of kk, αα, and ββ.

Study shows linear growth of index for free boundary minimal hypersurfaces.

problem Understanding the index growth of free boundary minimal hypersurfaces.
method Analyzes the Morse index growth in relation to homology groups and boundary components.
result Linear growth of index with dimension of first relative homology group and number of boundary components.

The paper studies foliation flows with logarithmic speeds and finds convergence to translating solutions.

problem Flowing foliations with specific curvature speeds and analyzing convergence behavior.
method Analyzes foliations of Rn+1{0}\mathbb{R}^{n+1}\setminus \{0\} with speeds log(F/f)-\log(F/f), focusing on uniformly convex hypersurfaces.
result There is a distinct leaf MΘM_{Θ_{*}} such that flows starting from it converge to a translating solution.

The study shows that close hypersurfaces have uniformly bounded inequalities.

problem Bounding inequalities for close hypersurfaces.
method Analyzing families of smooth hypersurfaces close to a fixed one.
result Uniformly bounded constants in Sobolev, Gagliardo-Nirenberg, and geometric Calderón-Zygmund inequalities.

Classifies ancient solutions to curvature flows, finding two main types.

problem Classifying ancient solutions to fully nonlinear curvature flows.
method Natural conditions on speed, convexity, noncollapsing, uniform two-convexity.
result Exactly two possibilities: self-similarly shrinking cylinder or rotationally symmetric translating soliton.

Compactness of singular minimal hypersurfaces with bounded volumes and eigenvalues.

problem Proving compactness of singular minimal hypersurfaces with specific bounded conditions.
method Using a combination of geometric and spectral analysis on Riemannian manifolds.
result Generalization of compactness results to higher dimensions.

The study calculates the average number of tangent k-dimensional subspaces to multiple convex hypersurfaces in random position.

problem Determining the average number of k-dimensional subspaces tangent to multiple convex hypersurfaces in random position.
method Investigates the problem from a random point of view, using the Orthogonal group to translate hypersurfaces and calculating the average number of k-flats tangent to all hypersurfaces.
result The average number of k-flats tangent to d_{k,n} many random (n-k-1)-flats is given by a formula involving volumes and curvature integrals.

Study of Brown--York mass for four-dimensional asymptotically flat manifolds.

problem Calculating mass for hypersurfaces in four-dimensional asymptotically flat manifolds.
method Intrinsic definition of mean curvature, expansion analysis for large uniformly convex hypersurfaces.
result Shape-dependent correction to ADM mass for nearly round surfaces vanishes under certain conditions.

The paper studies hypersurfaces in spheres using mean curvature flow with surgery.

problem Studying hypersurfaces in spheres under specific curvature pinching conditions.
method Using mean curvature flow with surgery to preserve and analyze curvature pinching conditions.
result Hypersurfaces satisfying the pinching condition are diffeomorphic to spheres or connected sums of spheres.

Derives a simpler equation for CR-curvature vanishing on certain complex hypersurfaces.

problem Deriving a simpler equation for CR-curvature vanishing on certain complex hypersurfaces.
method Utilizes two invariants discovered by S. Pocchiola to provide an alternative derivation of the CR-curvature vanishing condition.
result Provides an alternative derivation of the CR-curvature vanishing condition equivalent to the Monge equation.

The study proves the existence of kk-convex hypersurfaces for specific curvature equations.

problem Proving the existence of kk-convex hypersurfaces for Hessian curvature equations.
method Combining a priori estimates with the continuity method, and establishing a constant rank theorem.
result Existence and uniqueness of kk-convex hypersurfaces for both nonhomogeneous and homogeneous Hessian curvature equations.

Local rigidity proved for convex hypersurfaces in spaces of constant curvature.

problem Proving rigidity of convex hypersurfaces in spaces of constant curvature.
method Analyzing isometric convex hypersurfaces in spaces of constant curvature of dimension n4n\ge4.
result Two convex isometric hypersurfaces are congruent locally around their corresponding under strict convexity isometries.

Paper solves Dirichlet problem for pp-convex hypersurfaces with curvature constraints.

problem Solving the Dirichlet problem for pp-convex hypersurfaces with prescribed curvature.
method Proved existence of a graphic hypersurface satisfying the prescribed curvature equation with homogeneous boundary condition, obtained an interior curvature estimate.
result Existence of a graphic hypersurface satisfying the prescribed curvature equation with homogeneous boundary condition.

Compactness proven for manifolds with nonnegative Ricci curvature and uniformly convex boundary.

problem Compactness of manifolds with specific curvature and boundary conditions.
method Monotone quantities constructed from positive proper harmonic functions with Neumann condition.
result Proves compactness of manifolds with nonnegative Ricci curvature and uniformly convex boundary.

The study finds large Betti numbers in minimal hypersurfaces with positive Ricci curvature.

problem Minimal hypersurfaces with large Betti numbers in manifolds with positive Ricci curvature.
method Constructing sequences of manifolds with embedded minimal hypersurfaces.
result Minimal hypersurfaces have unbounded first Betti numbers.

The paper studies critical sections of the Allen-Cahn functional and their relation to minimal hypersurfaces.

problem Minimal hypersurfaces with boundary equal to a given submanifold.
method Analysis of the Allen-Cahn functional and its critical sections.
result The limit of critical sections converges to a stationary varifold, which is a minimal hypersurface away from the boundary.

Paper establishes an optimal inequality for convex hypersurfaces.

problem Optimal inequality for locally strongly convex centroaffine hypersurfaces.
method Used covariant derivatives of difference tensor and Tchebychev vector field.
result Complete classification of hypersurfaces realizing equality in inequality.

We prove a structural theorem that provides a precise local picture of how a sequence of closed embedded minimal hypersurfaces with uniformly bounded index (and volume if the ambient dimension is greater than three) in a Riemannian manifold of dimension at most seven, can degenerate. Loosely speaking, our results show …

2015-09-22abs ↗pdf ↗

The study extends Huisken's theorem to nonconvex surfaces that shrink to round points.

problem Extending Huisken's theorem to nonconvex surfaces.
method Constructing mean convex and non-mean convex hypersurfaces, using mean curvature flow.
result Found pathological examples of flows and sequences of flows that shrink to round points.

Paper proves rigidity of convex hypersurfaces in various spaces.

problem Proving the uniqueness of convex hypersurfaces in multidimensional spaces.
method Generalizing Senkin's theorem to higher dimensions and constant curvature spaces.
result Rigidity of convex hypersurfaces in En+1E^{n+1}, n3n \ge 3.

In this paper, we consider minimal hypersurfaces in the product space Hn×R\mathbb{H}^n \times \mathbb{R}. We begin by studying examples of rotation hypersurfaces and hypersurfaces invariant under hyperbolic translations. We then consider minimal hypersurfaces with finite total curvature. This assumption implies that the …

2008-08-28abs ↗pdf ↗

Optimal inequality for free boundary hypersurfaces in convex domains.

problem Proving an optimal Heintze-Karcher inequality for free boundary hypersurfaces.
method Analyzing anisotropic free boundary hypersurfaces in convex domains.
result Optimal Heintze-Karcher-type inequality achieved for anisotropic free boundary Wulff shapes.