Results 21 to 30 of about 3,701,157 (303)

Riemann Problems and Exact Solutions for the p-System

open access: yesMathematics, 2022
In this paper, within the framework of the Method of Differential Constraints, the celebrated p-system is studied. All the possible constraints compatible with the original governing system are classified.
Natale Manganaro, Alessandra Rizzo
doaj   +1 more source

Exact Solutions of Some Fractional Power Series

open access: yes, 2023
: In this paper, we obtain the exact solutions of two fractional power series. A new multiplication of fractional power series and Jumarie type of Riemann-Liouville (R-L) fractional calculus play important roles in this article.
Chii-Huei Yu
core   +1 more source

Exact anyon black hole solutions

open access: yesEuropean Physical Journal C: Particles and Fields, 2018
We present the exact anyon solutions and study their energy conditions. It is shown that the exact anyon VdW solutions with $$b>0$$ b>0 are physically un-acceptable.
Wei Xu
doaj   +1 more source

Exact solutions to supergravity [PDF]

open access: yesNuclear Physics B, 1997
18 pages, latex, uses a4.sty, no ...
openaire   +3 more sources

Some exact Bradlow vortex solutions

open access: yesJournal of High Energy Physics, 2017
We consider the Bradlow equation for vortices which was recently found by Manton and find a two-parameter class of analytic solutions in closed form on nontrivial geometries with non-constant curvature.
Sven Bjarke Gudnason, Muneto Nitta
doaj   +1 more source

Quasi-Hyperbolically Symmetric γ-Metric

open access: yesEntropy, 2023
We carry out a systematic study on the motion of test particles in the region inner to the naked singularity of a quasi-hyperbolically symmetric γ-metric. The geodesic equations are written and analyzed in detail. The obtained results are contrasted with
Luis Herrera   +3 more
doaj   +1 more source

In search of exact solutions [PDF]

open access: yesNature, 2001
Many-body systems, such as electrons flowing in a superconductor, are among the most difficult theoretical problems to study. A new family of exactly solvable models may offer some answers.
openaire   +3 more sources

Spherically Symmetric C3 Matching in General Relativity

open access: yesUniverse, 2023
We study the problem of matching interior and exterior solutions to Einstein’s equations along a particular hypersurface. We present the main aspects of the C3 matching approach that involve third-order derivatives of the corresponding metric tensors in ...
Hernando Quevedo
doaj   +1 more source

Evaluating Outreach Methods for Multi-Target Stool DNA Test for Colorectal Cancer Screening Among an Employer Population

open access: yesJournal of Primary Care & Community Health, 2021
Introduction/Objectives: Despite compelling evidence of clinical and economic benefits, adherence to colorectal cancer (CRC) screening remains low. Increasing public awareness through various outreach methods may improve screening uptake.
Martha E. Shepherd   +3 more
doaj   +1 more source

Uniqueness of non-trivial spherically symmetric black hole solution in special classes of F(R) gravitational theory

open access: yesPhysics Letters B, 2021
We show, in detail, that the only non-trivial black hole (BH) solutions for a neutral as well as a charged spherically symmetric space-times, using the class F(R)=R±F1(R), must-have metric potentials in the form h(r)=12−2Mr and h(r)=12−2Mr+q2r2.
G.G.L. Nashed
doaj   +1 more source

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