Results 31 to 40 of about 971,014 (304)

Boundary value problems with displacement for one mixed hyperbolic equation of the second order

open access: yesҚарағанды университетінің хабаршысы. Математика сериясы, 2023
The paper studies two nonlocal problems with a displacement for the conjugation of two equations of second-order hyperbolic type, with a wave equation in one part of the domain and a degenerate hyperbolic equation of the first kind in the other part. As
Zh.A. Balkizov
doaj   +1 more source

Singularity in classical and quantum Kepler problem with weak anisotropy [PDF]

open access: yesPhysics Letters A, 2002
Anisotropic Kepler problem is investigated by perturbation method in both classical and quantum mechanics. In classical mechanics, due to the singularity of the potential, global diffusion in phase space occurs at an arbitrarily small perturbation parameter.
Bai, Zaiqiao, Zheng, Weimou
openaire   +2 more sources

Charged BTZ black holes cannot be destroyed via the new version of the gedanken experiment

open access: yesEuropean Physical Journal C: Particles and Fields, 2021
The singularity at the center of charged Bañados–Teitelboim–Zanelli (BTZ) black holes is called a conical singularity. Unlike the canonical singularity in typical black holes, a conical singularity does not destroy the causality of spacetime.
Xin-Yang Wang, Jie Jiang
doaj   +1 more source

sylabs/singularity: SingularityCE 4.0.0

open access: yes, 2023
We are pleased to announce the availability of SingularityCE 4.0.0. This is a new major version, with the new OCI-mode becoming fully supported and expanded to use OCI-SIF images.
Dave Trudgian   +27 more
core   +1 more source

Finite-time singularity formation at a magnetic neutral line in Hall magnetohydrodynamics [PDF]

open access: yes, 2015
The formation of a current sheet in a weakly collisional plasma can be modelled as a finite-time singularity solution of magnetohydrodynamic equations.
Litvinenko, Yuri E.   +3 more
core   +1 more source

A Cylindrically Symmetric and Static Anisotropic Fluid Spacetime and the Naked Singularity

open access: yesAdvances in High Energy Physics, 2018
A cylindrically symmetric and static solution of Einstein’s field equations was presented. The spacetime is conformally flat and regular everywhere except on the symmetry axis where it possesses a naked curvature singularity.
Faizuddin Ahmed, Farook Rahaman
doaj   +1 more source

Multiple Positive Solutions of Second-Order Nonlinear Difference Systems with Repulsive Singularities

open access: yesJournal of Function Spaces, 2021
We study the existence of positive solutions for second-order nonlinear repulsive singular difference systems with periodic boundary conditions. Our nonlinearity may be singular in its dependent variable.
Shengjun Li, Fang Zhang
doaj   +1 more source

Positive periodic solution for prescribed mean curvature generalized Liénard equation with a singularity

open access: yesBoundary Value Problems, 2020
The main purpose of this paper is to investigate the existence of a positive periodic solution for a prescribed mean curvature generalized Liénard equation with a singularity (weak and strong singularities of attractive type, or weak and strong ...
Yun Xin, Zhibo Cheng
doaj   +1 more source

Solving the Singularity Problem of Non-Redundant Manipulators by Constaint Optimization [PDF]

open access: yes, 1999
A solution to the singularity problem of a non-redundant robot is proposed by reformulating the inverse kinematic problem as a constraint optimization problem.
Hirzinger, Gerd   +2 more
core  

AI AND THE SINGULARITY

open access: yes, 2020
"AI and the Technological Singularity: A Fallacy or a Great Opportunity" is a collection of essays that addresses the question of whether the technological singularity—the notion that AI-based computers can program the next generation of AI-based ...

core   +1 more source

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