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Localization of nanoscale objects with light singularities [PDF]

open access: yesNanophotonics
Unprecedented atomic-scale measurement resolution has recently been demonstrated in single-shot optical localization measurements based on deep-learning analyses of diffraction patterns of topologically structured light scattered from objects.
Grant Thomas A.   +4 more
doaj   +2 more sources

The Sharp Upper Estimate Conjecture for the Dimension δk(V) of New Derivation Lie Algebra

open access: yesMathematics, 2022
Hussain, Yau, and Zuo introduced the Lie algebra Lk(V) from the derivation of the local algebra Mk(V):=On/(g+J1(g)+⋯+Jk(g)). To find the dimension of a newly defined algebra is an important task in order to study its properties.
Naveed Hussain   +3 more
doaj   +1 more source

Avoidance of Singularity during the Gravitational Collapse with String T-Duality Effects

open access: yesUniverse, 2023
In this paper, we explore the gravitational collapse of matter (dust) under the effect of zero-point length l0. During the gravitational collapse, we neglect the backreaction effect of pre-Hawking radiation (in the sense that it is a small effect and ...
Kimet Jusufi
doaj   +1 more source

Singularities in Static Spherically Symmetric Configurations of General Relativity with Strongly Nonlinear Scalar Fields

open access: yesGalaxies, 2021
There are a number of publications on relativistic objects dealing either with black holes or naked singularities in the center. Here we show that there exist static spherically symmetric solutions of Einstein equations with a strongly nonlinear scalar ...
Oleksandr Stashko, Valery I. Zhdanov
doaj   +1 more source

The de Broglie–Bohm Quantum Theory and Its Application to Quantum Cosmology

open access: yesUniverse, 2021
We review the de Broglie–Bohm quantum theory. It is an alternative description of quantum phenomena in accordance with all the quantum experiments already performed.
Nelson Pinto-Neto
doaj   +1 more source

Geometrical Properties of the Pseudonull Hypersurfaces in Semi-Euclidean 4-Space

open access: yesMathematics, 2021
In this paper, we focus on some geometrical properties of the partially null slant helices in semi-Euclidean 4-space. By structuring suitable height functions, we obtain the singularity types of the pseudonull hypersurfaces, which are generated by the ...
Jianguo Sun, Xiaoyan Jiang, Fenghui Ji
doaj   +1 more source

Mapping the Tilt and Torsion Angles for a 3-SPS-U Parallel Mechanism

open access: yesRobotics, 2023
This article presents the analysis of a parallel mechanism of type 3-SPS-U. The usual singularity approach is carried out with respect to the Euler angles of the universal joint. However, this approach is computationally expensive especially when stacked
Swaminath Venkateswaran, Damien Chablat
doaj   +1 more source

Numerical solution of Cauchy problems with multiple poles of integer order

open access: yesDiscrete and Continuous Models and Applied Computational Science, 2022
We consider Cauchy problem for ordinary differential equation with solution possessing a sequence of multiple poles. We propose the generalized reciprocal function method.
Aleksandr A. Belov, Nikolay N. Kalitkin
doaj   +1 more source

On singularities of real algebraic sets and applications to kinematics

open access: yesOpen Mathematics, 2020
We address the question of identifying non-smooth points in Vℝ(I){{\bf{V}}}_{{\mathbb{R}}}(I) the real part of an affine algebraic variety. Two simple algebraic criteria will be formulated and proven.
Diesse Marc
doaj   +1 more source

The Borg’s Theorem for Singular Sturm-Liouville Problem with Non-Separated Boundary Conditions [PDF]

open access: yesMathematics Interdisciplinary Research, 2023
‎In this paper‎, ‎we consider a Sturm-Liouville equation with non-separated boundary conditions on a finite interval‎. ‎We discuss some properties of solutions of the Sturm-Liouville equation‎, ‎where the potential function has a singularity in the ...
Maedeh Bagherzadeh, Abdolali Neamaty
doaj   +1 more source

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