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.
We prove that if M is a complete hypersurface in Rn+1 which is graph of a real radial function, then the spectrum of the Laplace operator on M is the interval [0,∞).
We prove the existence and uniqueness of radial graphs over a given domain of Sn having boundary on the sphere Sn and whose mean curvature at every point equals a prescribed positive function satisfying suitable barrier-type and monotonicity conditions.
We show that a smooth radially symmetric solution u to the graphic Willmore surface equation is either a constant or the defining function of a half sphere in R3. In particular, radially symmetric entire Willmore graphs in R3 must be flat. When u is a smooth radial solution over a puncture…
Two combinatorial models for moduli space are compared and homotopy equivalence proven.
problem Comparing and relating combinatorial models of moduli space.
method Using a critical graph map to produce an explicit homotopy equivalence between Bödigheimer's radial slit configurations and Godin's admissible fat graphs, and discussing natural compactifications.
result Induces a cellular homeomorphism between unilevel harmonic compactification and Sullivan diagrams.
In this paper we extend a recent result of Collin-Rosenberg ({\it a solution to the minimal surface equation in the Euclidean disc has radial limits almost everywhere}) to a large class of differential operators in Divergence form. Moreover, we construct an example (in the spirit of \cite{CR2}) of a minimal graph in $\…
It is extended a result due to B. Guan and J. Spruck on the asymptotic Plateau's problem for CMC radial graphs in hyperbolic space to horizontal CMC graphs.
In this paper we find strictly locally convex hypersurfaces in Rn+1 with prescribed curvature and boundary. The main result is that if the given data admits a strictly locally convex radial graph as a subsolution, we can find a radial graph realizing the prescribed curvature and boundary. As an applicatio…
We consider the inverse mean curvature flow in smooth Riemannian manifolds of the form ([R0,∞)×Sn,gˉ) with metric gˉ=dr2+ϑ2(r)σ and non-positive radial sectional curvature. We prove, that for initial mean-convex graphs over Sn the flow exists for all times and remains a graph…
Researchers find hypersurfaces in a Riemannian vector bundle with specific curvature.
problem Finding compact hypersurfaces in a Riemannian vector bundle with prescribed vertical Gaussian curvature.
method Constructing hypersurfaces as radial graphs over the unit sphere subbundle and solving a nonlinear partial differential equation of Monge-Ampère type.
result Existence of smooth solutions to the problem.
Existence and uniqueness in Rn,1 of entire spacelike hypersurfaces contained in the future of the origin O and asymptotic to the light-cone, with scalar curvature prescribed at their generic point M as a negative function of the unit vector Om pointing in the direction of $\overrighta…
We study the asymptotic Dirichlet problem for the minimal graph equation on a Cartan-Hadamard manifold M whose radial sectional curvatures outside a compact set satisfy an upper bound K(P)≤−r(x)2φ(φ−1) and a pointwise pinching condition ∣K(P)∣≤CK∣K(P′)∣ for some constants φ>1 and $C_K\ge 1…
We extend the interior gradient estimate due to N. Korevaar and L. Simon for solutions of the mean curvature equation from the case of Euclidean graphs to the general case of Killing graphs. Our main application is the proof of existence of Killing graphs with prescribed mean curvature function for continuous boundary …
Nonlinear dimensionality reduction embeddings computed from datasets do not provide a mechanism to compute the inverse map. In this paper, we address the problem of computing a stable inverse map to such a general bi-Lipschitz map. Our approach relies on radial basis functions (RBFs) to interpolate the inverse map ever…
Convexity properties are preserved under radial transformations in hyperbolic and spherical geometries.
problem Preserving convexity in hyperbolic and spherical geometries under radial transformations.
method Used Poincaré disk model for hyperbolic geometry and stereographic projection for spherical geometry to prove preservation of convexity under radial expansion and contraction.
result Radial expansion and contraction preserve hyperbolic and spherical convexity, respectively.
The aim of this article is to establish a Toponogov type triangle comparison theorem for Finsler manifolds, in the manner of radial curvature geometry. We consider the situation that the radial flag curvature is bounded below by the radial curvature function of a non-compact surface of revolution, the edge opposite to …