arXiv research

New Kelvin transform for anisotropic elliptic problems.

Study proves uniform ellipticity implies uniform polyconvexity for anisotropic energy functionals.

In this paper, we investigate a holonomy invariant elliptic anisotropic surface energy for hypersurfaces in a complete Riemannian manifold, where "holonomy invariant" means that the elliptic parametric Lagrangian (i.e., a Finsler metric) of the Riemannian manifold used to define the anisotropic surface energy is consta…

Researchers solve an inverse problem for a semilinear elliptic equation on complex manifolds.

We show that for elliptic parametric functionals whose Wulff shape is smooth and has strictly positive curvature, any surface with constant anisotropic mean curvature which is a topological sphere is a rescaling of the Wulff shape.

The paper proves existence of special surfaces in 3D manifolds with constant curvature.

Study shows limits of volume-constrained sets are finite unions of Wulff shapes.

The study finds anisotropic minimal surfaces in 3-manifolds with smooth boundaries.

New method proves instability of naked singularity and censors it.

Given an elliptic integrand of class $\mathscr{C}^{3}$, we prove that finite unions of disjoint open Wulff shapes with equal radii are the only volume-constrained critical points of the anisotropic surface energy among all sets with finite perimeter and reduced boundary almost equal to its closure.

Anisotropic min-max theory constructs stable minimal surfaces in 3-manifolds.

The study shows properties of stable anisotropic minimal hypersurfaces in 4D space.

Graphs with bounded anisotropic mean curvature are regular almost everywhere.

In this paper we investigate the "area blow-up" set of a sequence of smooth co-dimension one manifolds whose first variation with respect to an anisotropic integral is bounded. Following the ideas introduced by White in (J. Differential Geom., 2016), we show that this set has bounded (anisotropic) mean curvature in the…

We study the geometry of complete immersed surfaces in $\mathbb{R}^3$ with constant anisotropic mean curvature (CAMC). Assuming that the anisotropic functional is uniformly elliptic, we prove that: (1) planes and CAMC cylinders are the only complete surfaces with CAMC whose Gauss map image is contained in a closed hemi…

Paper proves existence of anisotropic dynamical horizons in gravitational collapse.

After giving a general introduction to the main known results on the anisotropic Calder{ó}n problem on n-dimensional compact Riemannian manifolds with boundary, we give a motivated review of some recent non-uniqueness results obtained in [5, 6] for the anisotropic Calder{ó}n problem at fixed frequency, in dimension n $…

Utilizing a weight matrix we study surfaces of prescribed weighted mean curvature which yield a natural generalisation to critical points of anisotropic surface energies. We first derive a differential equation for the normal of immersions with prescribed weighted mean curvature, generalising a result of Clarenz and vo…

We completely describe Wahlquist-Estabrook prolongation structures (coverings) dependent on u, u_x, u_{xx}, u_{xxx} for the Krichever-Novikov equation u_t=u_{xxx}-3u_{xx}^2/(2u_x)+p(u)/u_x+au_x in the case when the polynomial p(u)=4u^3-g_2u-g_3 has distinct roots. We prove that there is a universal prolongation algebra…

Paper proves anisotropic Minkowski inequality and related inequalities.

Paper solves anisotropic capillary Minkowski problem for p ≥ 1.

Constructs polyhedral chains with prescribed tangent plane distributions.

Paper proves rigidity results for anisotropic capillary hypersurfaces.

Paper solves Minkowski problem for anisotropic p-torsional rigidity.

Unique ancient solutions found for anisotropic curve shortening flow.

Formula proves monotonicity for anisotropic minimal hypersurfaces.

In this paper, we study the anisotropic Minkowski problem. It is a problem of prescribing the anisotropic Gauss-Kronecker curvature for a closed strongly convex hypersurface in Euclidean space as a function on its anisotropic normals in relative or Minkowski geometry. We first formulate such problem to a Monge-Ampére t…

Motivated by the study of wave fronts in anisotropic media, we propose an incidence geometry of anisotropic spheres in a Finsler-Minkowski space. An anisotropic version of the Laguerre functional is considered. In some circumstances, this functional can be used to determine that two wavefronts observed at distinct time…

We introduce the anisotropic tensor calculus, which is a way of handling with tensors that depend on the direction remaining always in the same class. This means that the derivative of an anisotropic tensor is a tensor of the same type. As an application, we show how to define derivations using anisotropic linear conne…

A general approach to formulation of supergravity in higher order anisotropic superspaces (containing as particular cases different supersymmetric extensions and prolongations of Riemann, Finsler, Lagrange and Kaluza--Klein spaces) is given. We analyze three models of locally anisotropic supergravity.

Develops a PDE approach to constructing nontrivial anisotropic surfaces.

Paper studies stability of curved surfaces in a half-space.

Characterizes paths minimizing anisotropic lengths in Euclidean space.

Anisotropic minimal graphs over half-spaces are flat.

Study anisotropic flow for capillary hypersurfaces, proving new inequalities.

In this note, we give a classification of complete anisotropic isoparametric hypersurfaces, i.e., hypersurfaces with constant anisotropic principal curvatures, in Euclidean spaces, which is in analogue with the classical case for isoparametric hypersurfaces in Euclidean spaces. On the other hand, by an example of local…

We introduce a method for solving Calderón type inverse problems for semilinear equations with power type nonlinearities. The method is based on higher order linearizations, and it allows one to solve inverse problems for certain nonlinear equations in cases where the solution for a corresponding linear equation is not…

We study surfaces with constant anisotropic mean curvature which are invariant under a helicoidal motion. For functionals with axially symmetric Wulff shapes, we generalize the recently developed twizzler representation of Perdomo to the anisotropic case and show how all helicoidal constant anisotropic mean curvature s…

Study anisotropic capillary surfaces in a wedge using generalized Minkowski norms.

Study on Gauss map of anisotropic minimal surfaces with Morse index estimates.

Higher order anisotropic superspaces are constructed as generalized vector superbundles provided with compatible nonlinear connection, distinguished connection and metric structures.

Paper extends capillary convex body results to anisotropic setting with Alexandrov-Fenchel inequalities.

Introduces a new Hodge theory using vector fields on manifolds.

The paper studies a curve flow preserving anisotropic length for convex curves, leading to a homothetic limit.

In this paper we consider the evolution of a graph-like hypersurface by anisotropic mean curvature flow, under some restrictions on the anisotropic area integrand. We find interior estimates (in both time and space) on the gradient of such hypersurfaces, depending only on the height of the graph and the anisotropic are…

Given a positive function $F$ on $\mathbb S^n$ which satisfies a convexity condition, for $1\leq r\leq n$, we define for hypersurfaces in $\mathbb{R}^{n+1}$ the $r$-th anisotropic mean curvature function $H_{r; F}$, a generalization of the usual $r$-th mean curvature function. We call a hypersurface is anisotropic mini…

Study on special anisotropic conformal changes of conic pseudo-Finsler surfaces.

Study shows how weak inverse anisotropic mean curvature flow behaves at infinity.