arXiv research

Paper proves existence of anisotropic dynamical horizons in gravitational collapse.

New method proves instability of naked singularity and censors it.

We generalize Penrose's notion of conformal infinity of spacetime, to situations with anisotropic scaling. This is relevant not only for Lifshitz-type anisotropic gravity models, but also in standard general relativity and string theory, for spacetimes exhibiting a natural asymptotic anisotropy. Examples include the Li…

It is formulated a new 'anholonomic frame' method of constructing exact solutions of Einstein equations with off--diagonal metrics in 4D and 5D gravity. The previous approaches and results are summarized and generalized as three theorems which state the conditions when two types of ansatz result in integrable gravitati…

The horizon and geodesic structure of static configurations generated by anisotropic conformal transforms of the Schwarzschild metric is analyzed. We construct the maximal analytic extension of such off--diagonal vacuum metrics and conclude that for small deformations there are different classes of vacuum solutions of …

The 'anholonomic frame' method (see gr-qc/0005025, gr-qc/0001060 and hep-th/0110250) is applied for constructing new classes of exact solutions of vacuum Einstein equations with off-diagonal metrics in 4D and 5D gravity. We examine several black tori solutions generated by anholonomic transforms with non-trivial topolo…

We construct new classes of exact solutions of the 4D vacuum Einstein equations which describe ellipsoidal black holes, black tori and combined black hole -- black tori configurations. The solutions can be static or with anisotropic polarizations and running constants. They are defined by off--diagonal metric ansatz wh…

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…

Paper proves anisotropic Minkowski inequality and related inequalities.

New Kelvin transform for anisotropic elliptic problems.

Paper solves anisotropic capillary Minkowski problem for p ≥ 1.

Paper proves rigidity results for anisotropic capillary hypersurfaces.

Paper solves Minkowski problem for anisotropic p-torsional rigidity.

We study stationary configurations mimicking nonholonomic locally anisotropic black rings (for instance, with ellipsoidal polarizations and/or imbedded into solitonic backgrounds) in three/six dimensional pseudo-Finsler/ Riemannian spacetimes. In the asymptotically flat limit, for holonomic configurations, a subclass o…

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

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…

Graphs with bounded anisotropic mean curvature are regular almost everywhere.

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.

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

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.

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.

The paper proves stability of Wulff shapes using anisotropic curvature functionals.

Anisotropic curvature flow studied for planar networks.

Proves higher regularity for anisotropic inverse mean curvature flow.

In this paper, we introduce the anisotropic Sobolev capacity with fractional order and develop some basic properties for this new object. Applications to the theory of anisotropic fractional Sobolev spaces are provided. In particular, we give geometric characterizations for a nonnegative Radon measure $μ$ that naturall…

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

Anisotropic curvature flow of networks shows unique solutions and behavior under finite time.

Study anisotropic obstacle problem for minimal surfaces using Cahn-Hoffman transform.

Flat stable minimal hypersurfaces in 5 or 6D are always flat.

Optimal inequality for free boundary hypersurfaces in convex domains.