Results 101 to 110 of about 10,016 (227)

Singularities of Null Hypersurfaces of Pseudonull Curves

Journal of Function Spaces, 2015
The main goal of this paper is to study the singularities of null hypersurfaces of pseudonull curves. To do this we construct a null frame and a Lorentz distance-squared function of the pseudonull curve.
Xiupeng Cui, Donghe Pei
doaj   +1 more source

Four-dimensional projective orbifold hypersurfaces

, 2015
We classify four-dimensional quasismooth weighted hypersurfaces with small canonical class, and verify a conjecture of Johnson and Kollar on infinite series of quasismooth hypersurfaces with anticanonical hyperplane section in the case of fourfolds.
Kasprzyk, Alexander M., Alexander Kasprzyk, Brown, Gavin, Kasprzyk, Alexander, Gavin Brown   +4 more
core   +1 more source

Spherical tube hypersurfaces

, 2011
We examine Levi non-degenerate tube hypersurfaces in complex linear space which are "spherical," that is, locally CR-equivalent to the real hyperquadric. Spherical hypersurfaces are characterized by the condition of the vanishing of the CR-curvature form,
Alexander Isaev, Isaev, Alexander, Isaev, A.   +2 more
core   +1 more source

Computing arrangements of hypersurfaces

Journal of Software for Algebra and Geometry
We present a Julia package HypersurfaceRegions.jl for computing all connected components in the complement of an arrangement of real algebraic hypersurfaces in $\mathbb{R}^n$.
Paul Breiding, Bernd Sturmfels, Kexin Wang   +2 more
openaire   +2 more sources

Parabolicity and rigidity of spacelike hypersurfaces immersed in a Lorentzian Killing warped product [PDF]

, 2017
summary:In this paper, we extend a technique due to Romero et al. establishing sufficient conditions to guarantee the parabolicity of complete spacelike hypersurfaces immersed into a Lorentzian Killing warped product whose Riemannian base has parabolic ...
de Lima, Eudes L., Lima, Eraldo A. Jr., de Lima, Henrique F., Medeiros, Adriano A.   +3 more
core   +1 more source

Commuting Conditions of the k-th Cho operator with the structure Jacobi operator of real hypersurfaces in complex space forms

Open Mathematics, 2015
In this paper three dimensional real hypersurfaces in non-flat complex space forms whose k-th Cho operator with respect to the structure vector field ξ commutes with the structure Jacobi operator are classified.
Panagiotidou Konstantina, Pérez Juan de Dios   +1 more
doaj   +1 more source

On the RICCI Metric of a Hypersurface

Mathematische Nachrichten, 1991
Assume the Riemannian manifold \((M,\langle\;,\;\rangle)\) to have positive Ricci curvature; then by the Ricci tensor a second Riemannian metric, denoted by \(\langle\;,\;\rangle_ *\), is defined on \(M\). In the present paper the author studies this metric on ovaloids in Euclidean space \(E^{n+1}\).
openaire   +2 more sources

Almost-toric hypersurfaces [PDF]

Beiträge zur Algebra und Geometrie / Contributions to Algebra and Geometry, 2015
12 pages, 2 ...
openaire   +2 more sources

On Deformations of Nodal Hypersurfaces

, 2018
We extend the infinitesimal Torelli theorem for smooth hypersurfaces to nodal hypersurfaces.
Zhenjian Wang, Wang, Zhenjian
core   +1 more source

Algebraic hyperbolicity of very general hypersurfaces in homogeneous varieties [PDF]

Épijournal de Géométrie Algébrique
We generalize techniques by Coskun, Riedl, and Yeong, and obtain an almost optimal bound on the degree for the algebraic hyperbolicity of very general hypersurfaces in rational homogeneous varieties.
Lucas Mioranci
doaj   +1 more source