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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.

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48 results for isoperimetric problems

Solves relative isoperimetric problem on polygonal domains, focusing on corners.

problem Relative isoperimetric problem on polygonal domains in R2\mathbb{R}^2.
method Developed techniques for polygonal domains, with special attention to corners.
result Solved the relative isoperimetric problem for a square with a square corner removed.

Study minimizers in large volume isoperimetric problems with a new flatness criterion.

problem Minimizers in isoperimetric problems with a compact obstacle.
method Study Plateau-type problem with free boundary, develop mesoscale flatness criterion.
result Identify isoperimetric residue in energy expansion for large volume.

We solve the isoperimetric problem in the Lens spaces with large fundamental group. Namely, we prove that the isoperimetric surfaces are geodesic spheres or tori of revolution about geodesics. We also show that the isoperimetric problem in L(3,1) and L(3,2) follows from the proof of the Willmore conjecture by Marques a…

2017-02-19abs ↗pdf ↗

The paper studies nonlocal isoperimetric problems in hyperbolic space and finds unique minimizers for small volumes.

problem Nonlocal isoperimetric problem in hyperbolic space.
method Investigates minimization of a functional with perimeter and a nonlocal term derived from the negative power of distance.
result Geodesic balls are unique minimizers for small volumes in hyperbolic space.

We consider the isoperimetric problem in planar sectors with density rpr^{p}, and with density a>1a>1 inside the unit disk and 11 outside. We characterize solutions as a function of sector angle. We also solve the isoperimetric problem in Rn\mathbb{R}^{n} with density rp,  p<0r^{p},\; p<0.

2010-12-02abs ↗pdf ↗

Study the isoperimetric problem in Riemannian manifolds with non-trivial conformal vector fields.

problem Isoperimetric problem in Riemannian manifolds with non-trivial conformal vector fields.
method Introduced a mean curvature type flow to study the isoperimetric problem.
result Established the isoperimetric inequality for star-shaped hypersurfaces in such manifolds.

Study proves quantitative results for isoperimetric problem outside convex bodies in the plane.

problem Quantitative estimates for the relative isoperimetric problem outside convex bodies in the plane.
method Flow approach and Łojasiewicz estimates to prove quantitative stability for minimizers.
result Explicit constants and optimal exponents/rates for Łojasiewicz estimates and rates of convergence for gradient flow.

Overview of recent results on isoperimetric inequalities on manifolds with Ricci lower bounds.

problem Isoperimetric problem on manifolds with Ricci lower bounds.
method Modern tools and ideas from nonsmooth geometry.
result Sharp second order differential inequalities for isoperimetric profile.

We study the isoperimetric problem for Euclidean space endowed with a continuous density. In dimension one, we characterize isoperimetric regions for a unimodal density. In higher dimensions, we prove existence results and we derive stability conditions, which lead to the conjecture that for a radial log-convex density…

2006-02-07abs ↗pdf ↗

Local minimizers are convex and close to Wulff shapes.

problem Finding local minimizers in anisotropic isoperimetric problems.
method Showed local minimizers are geodesically convex and small smooth perturbations of tangent Wulff shapes.
result Local minimizers are quantitatively close to Wulff shapes.

The paper solves reverse isoperimetric problems for convex bodies with curvature constraints.

problem Finding the smallest volume among λλ-convex bodies of a given surface area.
method Using λλ-convex bodies and analyzing their properties in model spaces of constant curvature.
result The λλ-convex lens is the unique minimizer of volume among all λλ-convex bodies of given surface area in R3\mathbb{R}^3.

The study solves the isoperimetric problem for Heisenberg group norms.

problem Solving the isoperimetric problem for anisotropic norms in the Heisenberg group.
method Representation formula for perimeter, foliation property, differential equation characterization, approximation procedure.
result Characterization of isoperimetric sets as sub-Finsler analogues of Pansu's bubbles.

We show that any star-shaped convex hypersurface with constant Weingarten curvature in the deSitter-Schwarzschild manifold is a sphere of symmetry. Moreover, we study an isoperimetric problem for bounded domains in the doubled Schwarzschild manifold. We prove the existence of an isoperimetric surface for any value of t…

2012-08-20abs ↗pdf ↗

Geodesic balls are isoperimetric in hyperbolic spaces with certain densities.

problem Proving isoperimetric properties in hyperbolic spaces with specific densities.
method Using geodesic balls and radial, strictly log-convex densities.
result Geodesic balls are isoperimetric in real hyperbolic space HRnH_{\mathbb R}^n.

Proves strict inequality for minimizers of Willmore energy under isoperimetric constraints.

problem Minimizing the Willmore energy under isoperimetric constraints.
method Connected sum approach, building on previous work by Keller-Mondino-Rivière.
result Existence of minimizers for the isoperimetric constrained Willmore problem in every genus.

The study proves the existence and properties of isoperimetric clusters in Riemannian manifolds with bounded geometry.

problem Proving the existence and properties of isoperimetric clusters in Riemannian manifolds with bounded geometry.
method Proved the existence of isoperimetric clusters and compactness theorem for sequence of clusters, introduced Holder continuity of multi-isoperimetric profile.
result Existence and properties of isoperimetric clusters in Riemannian manifolds with bounded geometry.

We consider the problem of minimizing the relative perimeter under a volume constraint in an unbounded convex body CRn+1C\subset \mathbb{R}^{n+1}, without assuming any further regularity on the boundary of CC. Motivated by an example of an unbounded convex body with null isoperimetric profile, we introduce the concept of…

2016-06-13abs ↗pdf ↗

In this paper we consider the problem of minimizing the relative perimeter under a volume constraint in the interior of a conically bounded convex set, i.e., an unbounded convex body admitting an \emph{exterior} asymptotic cone. Results concerning existence of isoperimetric regions, the behavior of the isoperimetric pr…

2014-04-01abs ↗pdf ↗

Researchers find a surface with minimum bending energy for any genus and isoperimetric ratio.

problem Finding surfaces with minimum bending energy for given genus and isoperimetric ratio.
method Gluing catenoidal bridges to a singular solution of the Willmore equation on a punctured sphere.
result Existence of a surface with minimum bending energy for any genus and isoperimetric ratio.

The paper proves isoperimetric regions on Riemannian manifolds with Ricci bounded below.

problem Proving the existence of isoperimetric regions in Riemannian manifolds.
method Gromov-Hausdorff asymptotic analysis to study perimeter-minimizing sequences.
result Existence of isoperimetric regions in noncollapsed Riemannian manifolds with Ricci curvature bound.

We prove some old and new isoperimetric inequalities with the best constant using the ABP method applied to an appropriate linear Neumann problem. More precisely, we obtain a new family of sharp isoperimetric inequalities with weights (also called densities) in open convex cones of Rn\mathbb{R}^n. Our result applies to…

2013-04-05abs ↗pdf ↗

Square Clifford torus uniquely determined by isoperimetric ratio, rectangular torus not.

problem Uniqueness of 3D shape of rectangular Clifford torus based on isoperimetric ratio.
method Closed-form formulas for isoperimetric ratio of stereographic projection, strict monotonicity.
result Isoperimetric ratio does not uniquely determine rectangular Clifford torus shape.

Study nonnegatively curved Alexandrov spaces, proving isoperimetric conditions and structure at infinity.

problem Characterize Alexandrov spaces with nonnegative curvature and structure at infinity.
method Variational approach, focusing on volume growth, cylinder asymptotics, and isoperimetric sets.
result Equivalence of conditions on volume growth, cylinder asymptotics, and isoperimetric profile.

We consider the class of λλ-concave bodies in Rn+1\mathbb R^{n+1}; that is, convex bodies with the property that each of their boundary points supports a tangent ball of radius 1/λ1/λ that lies locally (around the boundary point) inside the body. In this class we solve a reverse isoperimetric problem: we show that the co…

2018-09-29abs ↗pdf ↗

Paper proves new isoperimetric inequality for minimal submanifolds with free boundary.

problem Proving a relative isoperimetric inequality for minimal submanifolds with free boundary.
method Generalized restricted normal cones, ABP method, Brendle's approach.
result Optimal relative isoperimetric inequality for minimal submanifolds with free boundary on convex surfaces.

The paper solves the isoperimetric problem on noncompact metric spaces with lower Ricci bounds.

problem Solving the isoperimetric problem on noncompact metric spaces with lower Ricci bounds.
method Establishes a structure theorem for minimizing sequences, proving the limit of such sequences is identified by a finite collection of isoperimetric regions.
result The limit of a minimizing sequence is identified by a finite collection of isoperimetric regions possibly contained in pointed Gromov--Hausdorff limits of the ambient space.

In this paper we consider the problem of minimizing the relative perimeter under a volume constraint in the interior of a convex body, i.e., a compact convex set in Euclidean space with interior points. We shall not impose any regularity assumption on the boundary of the convex set. Amongst other results, we shall prov…

2013-02-19abs ↗pdf ↗