Results 151 to 160 of about 42,383 (261)

On the structure vector field of a real hypersurface in complex quadric

open access: yesOpen Mathematics, 2018
From the notion of Jacobi type vector fields for a real hypersurface in complex quadric Qm we prove that if the structure vector field is of Jacobi type it is Killing when the real hypersurface is either Hopf or compact.
Dios Pérez Juan de
doaj   +1 more source

Almost-toric hypersurfaces [PDF]

open access: yesBeiträge zur Algebra und Geometrie / Contributions to Algebra and Geometry, 2015
12 pages, 2 ...
openaire   +2 more sources

Embedded positive constant r-mean curvature hypersurfaces in Mm × R

open access: yesAnais da Academia Brasileira de Ciências, 2005
Let M be an m-dimensional Riemannian manifold with sectional curvature bounded from below. We consider hypersurfaces in the (m + 1)-dimensional product manifold M x R with positive constant r-mean curvature.
Cheng Xu, Rosenberg Harold
doaj  

Curvatures of the Factorable Hypersurface

open access: yesJournal of Advances in Mathematics and Computer Science, 2020
The curvatures    of a factorable hypersurface are introduced in the four-dimensional Euclidean space. It is also given some relations on  of the factorable hypersurface.
openaire   +3 more sources

Curvatures of the translation hypersurface in 4-space

open access: yes, 2020
We study curvatures C_i (i=1,2,3) of translation hypersurface in the four dimensional Euclidean space.
Güler, Erhan, Kişi, Ömer
core   +1 more source

Modeling the boundaries of the working space of a planar three-link manipulator

open access: yesОмский научный вестник
A study of the boundaries of the working space of a three-link planar manipulator, specified by analytical equations, is carried out. A new geometric interpretation of these samples is proposed.
T. A. Sheveleva, A. A. Lyashkov
doaj   +1 more source

Minkowski Inequalities and non-isolated hypersurface singularities [PDF]

open access: yes
We derive a number of inequalities involving L\^e numbers of non-isolated hypersurface singularities. In particular, we derive L\^e-Iomdine formulas with inequalities and use these, together with Teissier's Minkowski inequalities for sectional Milnor ...
Massey, David B.
core   +1 more source

A note about almost contact metric hypersurfaces axioms for almost Hermitian manifolds

open access: yesДифференциальная геометрия многообразий фигур
From 1950s, it is known that an almost contact metric structure is in­duced on an arbitrary oriented hypersurface in an almost Hermitian mani­fold. In accordance with the definition, an almost Hermitian manifold satisfies the axiom of almost contact ...
A. Abu-Saleem   +2 more
doaj   +1 more source

Initial logarithmic Lie algebras of hypersurface singularities [PDF]

open access: yes, 2009
We introduce a Lie algebra of initial terms of logarithmic vector fields along a hypersurface singularity. Extending the formal structure theorem in [GS06, Thm. 5.4], we show that the completely reducible part of its linear projection lifts formally to a
J.M. Granger, M. Schulze
core   +1 more source

Global hypersurfaces of section for geodesic flows on convex hypersurfaces

open access: yesArchiv der Mathematik
We construct a global hypersurface of section for the geodesic flow of a convex hypersurface in Euclidean space admits an isometric involution. This generalizes the Birkhoff annulus to higher dimensions.
Sunghae Cho, Dongho Lee
openaire   +3 more sources

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