Results 131 to 140 of about 320,618 (278)

On area comparison and rigidity involving the scalar curvature [PDF]

open access: yes
In this thesis we study the effects of lower bounds for the curvature of a Riemannian manifold M on the geometry and topology of closed, minimal hypersurfaces.
Moraru, Vlad
core  

A characterization of harmonic foliations by the volume preserving property of the normal geodesic flow

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2002
We prove that a Riemannian foliation with the flat normal connection on a Riemannian manifold is harmonic if and only if the geodesic flow on the normal bundle preserves the Riemannian volume form of the canonical metric defined by the adapted connection.
Hobum Kim
doaj   +1 more source

Degenerate Foliations in Sasakian Semi-Riemannian Manifolds

open access: yes
In the Semi-Riemannian case we do not have the liability of the existence of such a metric being a difference from the Riemannian case. A Semi-Riemannian manifold provided with a normal contact metric structure is called Sasakian manifold.Semi-Riemannian,
Catalin Angelo Ioan
core  

On W2-Curvature Tensor in a Kenmotsu Manifold

open access: yes, 2016
[[abstract]]The purpose of this paper is to study some properties of W2-curvature tensor in Riemannian and Kenmotsu ...
Giteshwari Pandey   +2 more
core  

Evolution paths on the equilibrium manifold

open access: yes
In a pure exchange smooth economy with fixed total resources, we de- fine the length between two regular equilibria belonging to the equilibrium manifold as the number of intersection points of the evolution path connecting them with the set of critical ...
Andrea, Loi, Stefano, Matta
core  

Neumann eigenvalue estimate on a compact Riemannian manifold

open access: yes, 1990
In their article, P. Li and S. T. Yau give a lower bound of the first Neumann eigenvalue in terms of geometrical invariants for a compact Riemannian manifold with convex boundary.
Roger Chen
core   +1 more source

Semi-invariant lightlike submanifolds of a semi-Riemannian product manifold

open access: yes, 2007
In this paper, we introduce a new class of lightlike submanifolds, namely, semi-invariant lightlike submanifolds of a semi-Riemannian product manifold. We investigate totally umbilical, curvature invariant lightlike submanifolds in real space forms M-1(c(
Atceken, Mehmet   +3 more
core   +1 more source

Radar Target Detection with K-Nearest Neighbor Manifold Filter on Riemannian Manifold

open access: yesAdvances in Mathematical Physics
In this paper, we propose a K-nearest neighbor manifold filter on the Riemannian manifold and apply it to signal detection within clutter. In particular, the correlation and power of sample data in each cell are modeled as an Hermitian positive definite (
Dongao Zhou   +3 more
doaj   +1 more source

Home - About - Disclaimer - Privacy