Results 51 to 60 of about 88,622 (197)

Anti-Invariant Semi-Riemannian Submersions from Almost Para-Hermitian Manifolds

Journal of Function Spaces and Applications, 2013
We introduce anti-invariant semi-Riemannian submersions from almost para-Hermitian manifolds onto semi-Riemannian manifolds. We give an example, investigate the geometry of foliations which are arisen from the definition of a semi-Riemannian submersion ...
Yılmaz Gündüzalp
doaj   +1 more source

An Information-geometric Approach to Sensor Management

, 2012
An information-geometric approach to sensor management is introduced that is based on following geodesic curves in a manifold of possible sensor configurations.
Cochran, Douglas, Howard, Stephen D., Moran, Bill   +2 more
core   +1 more source

Initial State Privacy of Nonlinear Systems on Riemannian Manifolds

International Journal of Robust and Nonlinear Control, EarlyView.
ABSTRACT In this paper, we investigate initial state privacy protection for discrete‐time nonlinear closed systems. By capturing Riemannian geometric structures inherent in such privacy challenges, we refine the concept of differential privacy through the introduction of an initial state adjacency set based on Riemannian distances.
Le Liu, Yu Kawano, Antai Xie, Ming Cao
wiley   +1 more source

Curvature homogeneous riemannian manifolds [PDF]

Annales scientifiques de l'École normale supérieure, 1989
The authors consider a Riemannian manifold \((M,g)\) with the same curvature tensor (at each point \(m\in M)\) as a Riemannian symmetric ``model space'' \((M^ 0,g^ 0)\), and they prove the following theorem: If the nullity distribution of the curvature tensor of \((M,g)\) is parallel, then \((M,g)\) is locally symmetric and locally isometric to \((M^ 0,
Tricerri, Franco, Vanhecke, Lieven
openaire   +2 more sources

Fiber-Preserving Conformal Vector Field of Frame Bundles with Natural Riemannian Metric [PDF]

Memoirs of the Scientific Sections of the Romanian Academy, 2019
We consider the bundle of all oriented orthonormal frames over an orientable Remannian manifold. This bundle has a natural Riemannian metric which is defined by the Riemannian connection of the base manifold.
M.T.K. Abbassi , N. Amri
doaj  

Cohomological tautness for Riemannian foliations

, 2008
In this paper we present some new results on the tautness of Riemannian foliations in their historical context. The first part of the paper gives a short history of the problem.
A. Haefliger, A. Haefliger, A. Haefliger, A. Kacimi El, A. Kacimi et El, B. Reinhart, B. Reinhart, D. Domínguez, D. Dom’inguez, D. Sullivan, F. W. Kamber, F. W. Kamber, G. Cairns, G. E. Bredon, H. Boualem, H. Gluck, H. J. Sussmann, H. Rummler, J. A. Álvarez López, J. I. Royo Prieto, J. I. Royo Prieto, J. I. Royo Prieto, J. McCleary, M. Saralegi-Aranguren, M. Saralegi-Aranguren, M. Saralegi-Aranguren, P. Molino, P. Molino, P. Molino, P. Molino, P. Stefan, Ph. Tondeur, R. Wolak, R. Wolak, V. Miquel, V. Sergiescu, V. Sergiescu, W. Greub, X. Masa, Y. Carrière   +39 more
core   +3 more sources

SDFs from Unoriented Point Clouds using Neural Variational Heat Distances

Computer Graphics Forum, EarlyView.
We propose a novel variational approach for computing neural Signed Distance Fields (SDF) from unoriented point clouds. We first compute a small time step of heat flow (middle) and then use its gradient directions to solve for a neural SDF (right). Abstract We propose a novel variational approach for computing neural Signed Distance Fields (SDF) from ...
Samuel Weidemaier, Florine Hartwig, Josua Sassen, Sergio Conti, Mirela Ben‐Chen, Martin Rumpf   +5 more
wiley   +1 more source

Optimal inequalities involving Casorati curvatures for Riemannian maps to nearly Kaehler manifolds

Journal of Inequalities and Applications
We establish a general inequality and optimal inequalities involving the normalized Casorati curvatures and the generalized normalized Casorati curvatures within the horizontal space of a Riemannian map from a Riemannian manifold to a nearly Kaehler ...
Tanveer Fatima, Reetu Maini, Garima Gupta, Rakesh Kumar, Rashmi Sachdeva, Rachna Rani   +5 more
doaj   +1 more source

The Mixed Scalar Curvature of a Twisted Product Riemannian Manifolds and Projective Submersions

Mathematics, 2019
In the present paper, we study twisted and warped products of Riemannian manifolds. As an application, we consider projective submersions of Riemannian manifolds, since any Riemannian manifold admitting a projective submersion is necessarily a twisted ...
Vladimir Rovenski, Sergey Stepanov, Irina Tsyganok   +2 more
doaj   +1 more source

Survey on differential estimators for 3d point clouds

Computer Graphics Forum, EarlyView.
Abstract Recent advancements in 3D scanning technologies, including LiDAR and photogrammetry, have enabled the precise digital replication of real‐world objects. These methods are widely used in fields such as GIS, robotics, and cultural heritage. However, the point clouds generated by such scans are often noisy and unstructured, posing challenges for ...
Léo Arnal–Anger, Thibault Lejemble, David Coeurjolly, Loïc Barthe, Nicolas Mellado   +4 more
wiley   +1 more source