Results 51 to 60 of about 373,220 (224)

Quantum GraviElectro Dynamics

Annalen der Physik, EarlyView.
The BRST invariant Lagrangian of the gravitationally interacting U(1)$U(1)$ gauge theory, namely the Quantum GraviElectro Dynamics (QGED). The Yan–Mills theory with the Hilbert–Einstein gravitational Lagrangian, namely the Yang–Mills–Utiyama (YMU) theory, is defined and quantised using the standard procedure. The theory is perturbatively renormalisable,
Yoshimasa Kurihara
wiley   +1 more source

Applications of Disaffinity Vectors to Certain Riemannian Manifolds

Mathematics
A disaffinity vector on a Riemannian manifold is a vector field whose affinity tensor vanishes. In this paper, we prove that every disaffinity vector on a compact Riemannian manifold is an incompressible vector field.
Hanan Alohali, Sharief Deshmukh, Bang-Yen Chen   +2 more
doaj   +1 more source

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  

On infinitesimal holomorphically projective transformations on the tangent bundles with respect to the Sasaki metric; pp. 149–157 [PDF]

Proceedings of the Estonian Academy of Sciences, 2011
The purpose of the present article is to find solutions to a system of partial differential equations that characterize infinitesimal holomorphically projective transformations on the tangent bundle with the Sasaki metric and an adapted almost complex ...
Aydin Gezer
doaj   +1 more source

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

Ellipsoid‐Based Interval‐Type Uncertainty Model Updating Based on Riemannian Manifold and Gaussian Process Model

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT Modern engineering systems require advanced uncertainty‐aware model updating methods that address parameter correlations beyond conventional interval analysis. This paper proposes a novel framework integrating Riemannian manifold theory with Gaussian Process Regression (GPR) for systems governed by Symmetric Positive‐Definite (SPD) matrix ...
Yanhe Tao, Qintao Guo, Jin Zhou, Cheng Yi   +3 more
wiley   +1 more source

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

The Riemannian manifold of all Riemannian metrics

, 1991
The space of all Riemannian metrics on a smooth second countable finite dimensional manifold is itself a smooth manifold modeled on the space of symmetric (0,2)-tensor fields with compact support.
Gil-Medrano, Olga, Michor, Peter W.
core   +4 more sources

Renormalized Energy Between Vortices in Some Ginzburg–Landau Models on 2-Dimensional Riemannian Manifolds [PDF]

, 2021
Radu Ignat, Robert L. Jerrard
openalex   +1 more source

Reference Tracking and Disturbance Rejection for Nonlinear Systems Using LPV Control

International Journal of Robust and Nonlinear Control, EarlyView.
ABSTRACT The Linear Parameter‐Varying (LPV) framework has been introduced with the intention to provide stability and performance guarantees for analysis and controller synthesis for Nonlinear (NL) systems through convex methods. By extending results of the Linear Time‐Invariant framework, mainly based on quadratic stability and performance using ...
Patrick J. W. Koelewijn, Roland Tóth, Henk Nijmeijer, Siep Weiland   +3 more
wiley   +1 more source