Results 161 to 170 of about 1,380,597 (301)

Mental State Detection Using Riemannian Geometry on Electroencephalogram Brain Signals. [PDF]

open access: yesFront Hum Neurosci, 2021
Wriessnegger SC   +3 more
europepmc   +1 more source

Natural Connections on Riemannian Product Manifolds [PDF]

open access: yesarXiv, 2011
A Riemannian almost product manifold with integrable almost product structure is called a Riemannian product manifold. In the present paper the natural connections on such manifolds are studied, i.e. the linear connections preserving the almost product structure and the Riemannian metric.
arxiv  

The sphere and the cut locus at a tangency point in two-dimensional almost-Riemannian geometry

open access: yes, 2010
We study the tangential case in 2-dimensional almost-Riemannian geometry. We analyse the connection with the Martinet case in sub-Riemannian geometry. We compute estimations of the exponential map which allow us to describe the conjugate locus and the ...
Bonnard, Bernard   +3 more
core   +1 more source

Homogeneous structures of $3$-dimensional Lie groups [PDF]

open access: yesarXiv
We give a classification of homogeneous Riemannian structures on (non locally symmetric) $3$-dimensional Lie groups equipped with left invariant Riemannian metrics. This work together with classifications due to previous works yields a complete classification of all the homogeneous Riemannian structures on homogeneous Riemannian $3$-spaces.
arxiv  

A Liouvile-type theorems for some classes of complete Riemannian almost product manifolds and for special mappings of complete Riemannian manifolds [PDF]

open access: yesarXiv, 2016
In the present paper we prove Liouville-type theorems: non-existence theorems for some complete Riemannian almost product manifolds and special mappings of complete Riemannian manifolds which generalize similar results for compact manifolds.
arxiv  

Anti-invariant Riemannian submersions from locally conformal Kaehler manifolds [PDF]

open access: yesarXiv, 2019
B. Sahin [9] introduced the notion of anti-invariant Riemannian submersions from almost Hermitian manifolds onto Riemannian manifolds. In the present paper we extend the notion of anti-invariant and Lagrangian Riemannian submersions (a special anti-invariant Riemannian submersion) to the case of locally conformal Kaehler manifolds.
arxiv  

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