Results 21 to 30 of about 2,282 (200)

The jump and stagnation of mass with speed

open access: yesIET Quantum Communication, 2022
In the general theory of relativity, the four‐dimensional space‐time of describing a mass body accelerated motion or in a gravitational field, although it is a curved Riemannian geometric space from the perspective of “integral geometry”, but for any ...
Jun Dong, Na Dong
doaj   +1 more source

Erratum to ``The geometry of hemi-slant submanifolds of a locally product Riemannian manifold"

open access: yesTURKISH JOURNAL OF MATHEMATICS, 2016
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Taştan, Hakan Mete, Özdemir, Fatma
openaire   +1 more source

Non-metric geometry as the origin of mass in gauge theories of scale invariance

open access: yesEuropean Physical Journal C: Particles and Fields, 2023
We discuss gauge theories of scale invariance beyond the Standard Model (SM) and Einstein gravity. A consequence of gauging this symmetry is that their underlying 4D geometry is non-metric ( $$\nabla _\mu g_{\alpha \beta }\!\not =\!0$$ ∇ μ g α β ≠ 0 ...
D. M. Ghilencea
doaj   +1 more source

Topics in sub-Riemannian geometry [PDF]

open access: yes, 2016
This thesis is concerned with three different problems in sub-Riemannian geometry faced during my PhD. The first one is a problem in differential geometry and is about the local conformal classification of a certain class of sub-Riemannian structures. In
Agrachev, Andrey, Boarotto, Francesco
core   +1 more source

Log‐Euclidean bag of words for human action recognition

open access: yesIET Computer Vision, 2015
Representing videos by densely extracted local space–time features has recently become a popular approach for analysing actions. In this study, the authors tackle the problem of categorising human actions by devising bag of words (BoWs) models based on ...
Masoud Faraki   +2 more
doaj   +1 more source

Discrete-Time Differential Dynamic Programming on SO(3) With Pose Constraints

open access: yesIEEE Access, 2022
The motion of many robotics systems, such as the rotation of unmanned aerial vehicles, can be modeled by SO(3). However, the difficulties in the parameterization of the SO(3) makes it hard to implement the state-of-the-art collision avoidance algorithm ...
Shu Liu, Dongpo Liu
doaj   +1 more source

Swimming in Curved Surfaces and Gauss Curvature

open access: yesUniversitas Scientiarum, 2018
The Cartesian-Newtonian paradigm of mechanics establishes that, within an inertial frame, a body either remains at rest or moves uniformly on a line, unless a force acts externally upon it.
Leonardo Solanilla   +2 more
doaj   +1 more source

Geometric Reinforcement Learning for Robotic Manipulation

open access: yesIEEE Access, 2023
Reinforcement learning (RL) is a popular technique that allows an agent to learn by trial and error while interacting with a dynamic environment.
Naseem Alhousani   +5 more
doaj   +1 more source

Riemannian Simplices and Triangulations [PDF]

open access: yes, 2014
We study a natural intrinsic definition of geometric simplices in Riemannian manifolds of arbitrary finite dimension, and exploit these simplices to obtain criteria for triangulating compact Riemannian manifolds.
Vegter, Gert   +6 more
core   +1 more source

Non-local geometry inside Lifshitz horizon

open access: yesJournal of High Energy Physics, 2017
Based on the quantum renormalization group, we derive the bulk geometry that emerges in the holographic dual of the fermionic U(N ) vector model at a nonzero charge density. The obstruction that prohibits the metallic state from being smoothly deformable
Qi Hu, Sung-Sik Lee
doaj   +1 more source

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