Results 91 to 100 of about 73,367 (201)

Lorentzian homogeneous structures with indecomposable holonomy

Journal of the London Mathematical Society, Volume 113, Issue 5, May 2026.
Abstract For a Lorentzian homogeneous space, we study how algebraic conditions on the isotropy group affect the geometry and curvature of the homogeneous space. More specifically, we prove that a Lorentzian locally homogeneous space is locally isometric to a plane wave if it admits an Ambrose–Singer connection with indecomposable, non‐irreducible ...
Steven Greenwood, Thomas Leistner
wiley   +1 more source

Convergence of formal embeddings between real-analytic hypersurfaces in codimension one

, 2002
We show that every formal embedding sending a real-analytic strongly pseudoconvex hypersurface in $M\subset \C^N$ into another such hypersurface in $M'\subset \C^{N+1}$ is convergent.
Mir, Nordine
core   +2 more sources

Hypersurfaces with nonnegative Ricci curvature in hyperbolic space

, 2017
Based on properties of n-subharmonic functions we show that a complete, noncompact, properly embedded hypersurface with nonnegative Ricci curvature in hyperbolic space has an asymptotic boundary at infinity of at most two points.
Bonini, Vincent, Ma, Shiguang, Qing, Jie
core  

Right Conoids Demonstrating a Time-like Axis within Minkowski Four-Dimensional Space

Mathematics
In the four-dimensional Minkowski space, hypersurfaces classified as right conoids with a time-like axis are introduced and studied. The computation of matrices associated with the fundamental form, the Gauss map, and the shape operator specific to these
Yanlin Li, Erhan Güler
doaj   +1 more source

Some Integral Formulas for the (r + 1)th Mean Curvature of a Closed Hypersurface

International Journal of Mathematics and Mathematical Sciences, 2012
By using the operator 𝐿𝑟, we define the notions of rth order and rth type of a Euclidean hypersurface. By the use of these notions, we are able to obtain some sharp estimates of the (𝑟+1)th mean curvature for a closed hypersurface of the Euclidean space ...
Akram Mohammadpouri, S. M. B. Kashani
doaj   +1 more source

Ternary Gas Mixture Quantification Using Field Asymmetric Ion Mobility Spectrometry (FAIMS)

Sensors, 2019
Gas mixture quantification is essential for the recording and reproducing odors, because an odor consists of multiple chemical compounds. Gas mixture quantification using field asymmetric ion mobility spectrometry (FAIMS) was studied.
Yasufumi Yokoshiki, Takamichi Nakamoto
doaj   +1 more source

Lefschetz theorem for abelian fundamental group with modulus

, 2013
We prove a Lefschetz hypersurface theorem for abelian fundamental groups allowing wild ramification along some divisor. In fact, we show that isomorphism holds if the degree of the hypersurface is large relative to the ramification along the divisor ...
Kerz, Moritz, Saito, Shuji
core  

Extended Darboux frame curvatures of Frenet curves lying on parametric 3-surfaces

Kuwait Journal of Science, 2019
In this paper, we consider a Frenet curve lying on a parametric hypersurface in 4-dimensional Euclidean space and obtain the expressions of its curvatures with respect to the ...
Bahar Uyar Düldül, Mustafa Düldül
doaj  

Almost-toric hypersurfaces [PDF]

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

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