Results 121 to 130 of about 12,561 (233)

H-contact semi-Riemannian manifolds [PDF]

open access: yes, 2013
We characterize H-contact semi-Riemannian manifolds (i.e., contact semi-Riemannian manifolds whose Reeb vector field ξ is harmonic) by the condition that ξ is a Ricci eigenvector. We then investigate how H-contact semi-Riemannian manifolds are related to
CALVARUSO, Giovanni, PERRONE, Domenico
core   +1 more source

Ruled Surfaces in 3-Dimensional Riemannian Manifolds [PDF]

open access: yes
In this work, ruled surfaces in 3-dimensional Riemannian manifolds are studied. We determine the expressions for the extrinsic and sectional curvatures of a parametrized ruled surface, where the former one is shown to be non-positive.
Rosado, M. Eugenia   +2 more
core   +1 more source

Differentiable approximations to Brownian motion on manifolds [PDF]

open access: yes
The main part of this thesis is devoted to generalised Ornstein-Uhlenbeck processes. We show how to construct such processes on 2-uniformly smooth Banach spaces.
Dowell, Richard Malcolm
core  

Iterated Relation Systems on Riemannian Manifolds

open access: yesFractal and Fractional
For fractals on Riemannian manifolds, the theory of iterated function systems often does not apply well directly, as these fractal sets are often defined by relations that are multivalued or non-contractive.
Jie Liu, Sze-Man Ngai, Lei Ouyang
doaj   +1 more source

A remark on infinity-harmonic functions on Riemannian manifolds

open access: yesElectronic Journal of Differential Equations, 1995
functions on Riemannian manifolds. As a corollary, there is no non-constant $infty$-harmonic function on positively (or negatively) curved manifolds.
Nobumitsu Nakauchi
doaj  

RICCI ALMOST SOLITONS ON RIEMANNIAN MANIFOLDS [PDF]

open access: yes, 2019
[[abstract]]The present paper deals with the study of Riemannian mani-folds whose metric is Ricci almost soliton with a conformal Killing vector field.
Akshoy Patra, Shyamal Kumar Hui
core  

Holonomy and submanifold geometry [PDF]

open access: yes, 2002
We survey applications of holonomic methods to the study of submanifold geometry, showing the consequences of some sort of extrinsic version of de Rham decomposition and Berger's Theorem, the so-called Normal Holonomy Theorem.
CONSOLE S   +4 more
core  

Slant submersions from almost paracontact Riemannian manifolds

open access: yesKuwait Journal of Science, 2015
In this paper, we introduce slant submersions from almost paracontact Riemannian manifoldsonto Riemannian manifolds. We give examples and investigate the geometry of foliationswhich are arisen from the definition of a Riemannian submersion.
YILMAZ GÜNDÜZALP
doaj  

Stability of vertical minimal surfaces in three-dimensional sub-Riemannian manifolds

open access: yesPracì Mìžnarodnogo Geometričnogo Centru
We obtain first and second variation formulae for minimal surfaces in three-dimensional sub-Riemannian manifolds which are vertical, i.e., perpendicular to the horizontal distribution of the sub-Riemannian structure.
Eugene Petrov, Ihor Havrylenko
doaj   +1 more source

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