Results 51 to 60 of about 73,738 (309)

Empirical Means on Pseudo-Orthogonal Groups

open access: yesMathematics, 2019
The present article studies the problem of computing empirical means on pseudo-orthogonal groups. To design numerical algorithms to compute empirical means, the pseudo-orthogonal group is endowed with a pseudo-Riemannian metric that affords the ...
Jing Wang, Huafei Sun, Simone Fiori
doaj   +1 more source

Geodesic Mappings of Special Riemannian Manifolds

open access: yes, 2021
We noticed some mistakes and we will correct ...
Çoraplı, Ahmet Umut   +1 more
openaire   +2 more sources

Synchrotron Radiation for Quantum Technology

open access: yesAdvanced Functional Materials, EarlyView.
Materials and interfaces underpin quantum technologies, with synchrotron and FEL methods key to understanding and optimizing them. Advances span superconducting and semiconducting qubits, 2D materials, and topological systems, where strain, defects, and interfaces govern performance.
Oliver Rader   +10 more
wiley   +1 more source

Wave propagation time optimization for geodesic distances calculation using the Heat Method

open access: yesOpen Physics, 2019
Finding the geodesic path defined as the shortest paths between two points on three-dimensional surface P is a well known problem in differential and computational geometry.
Wróblewski Artur, Andrzejczak Jarosław
doaj   +1 more source

An elementary proof of Franks' lemma for geodesic flows [PDF]

open access: yes, 2013
Given a Riemannian manifold $(M,g)$ and a geodesic $\gamma$, the perpendicular part of the derivative of the geodesic flow $\phi_g^t: SM \rightarrow SM$ along $\gamma$ is a linear symplectic map. We give an elementary proof of the following Franks' lemma,
Visscher, Daniel
core  

TreeSpider: In‐Canopy Exploration With Tether‐Based Aerial Modular Arms

open access: yesAdvanced Robotics Research, EarlyView.
A tethered drone with perching arms and a 360° ring enables unprecedented maneuverability within dense forest canopies. By dynamically adjusting tether length and decoupling pitch from the frame, it navigates between branches, senses multiple trees, and interacts physically with foliage.
Luca Romanello   +7 more
wiley   +1 more source

Limiting distributions of curves under geodesic flow on hyperbolic manifolds

open access: yes, 2008
We consider the evolution of a compact segment of an analytic curve on the unit tangent bundle of a finite volume hyperbolic $n$-manifold under the geodesic flow. Suppose that the curve is not contained in a stable leaf of the flow.
Shah, Nimish A.
core   +2 more sources

Transient Antiskyrmion‐Mediated Topological Transitions in Isotropic Magnets

open access: yesAdvanced Science, EarlyView.
A transient antiskyrmion‐mediated pathway that drives repeated stripe‐to‐skyrmion transitions is revealed, producing a net increase in topological charge in isotropic Dzyaloshinskii–Moriya interaction films. Experiments and simulations identify the antiskyrmion as a metastable excitation, enabling stochastic bitstream generation for probabilistic ...
Bingqian Dai   +18 more
wiley   +1 more source

Cost of holographic path integrals

open access: yesSciPost Physics, 2023
We consider proposals for the cost of holographic path integrals. Gravitational path integrals within finite radial cutoff surfaces have a precise map to path integrals in $T\overline{T}$ deformed holographic CFTs. In Nielsen's geometric formulation cost
Ammanamanchi Ramesh Chandra, Jan de Boer, Mario Flory, Michal P. Heller, Sergio Hörtner, Andrew Rolph
doaj   +1 more source

Shear coordinate description of the quantised versal unfolding of D_4 singularity

open access: yes, 2010
In this paper by using Teichmuller theory of a sphere with four holes/orbifold points, we obtain a system of flat coordinates on the general affine cubic surface having a D_4 singularity at the origin.
Bolibruch A A   +14 more
core   +1 more source

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