Results 1 to 10 of about 8,898,771 (321)

Moving Singular Points and the Van der Pol Equation, as Well as the Uniqueness of Its Solution

open access: yesMathematics, 2023
The article considers the Van der Pol equation nonlinearity aspect related to a moving singular point. The fact of the existence of moving singular points and the uniqueness of their solution for complex domains have been proved.
Victor Orlov
doaj   +3 more sources

IMPROVING A POSTERIORI SPATIAL DISCRETIZATION ERROR ESTIMATION FOR SN TRANSPORT BY SINGULAR CHARACTERISTICS TRACKING [PDF]

open access: yesEPJ Web of Conferences, 2021
Previously, we have developed a novel spatial discretization error estimator, the “residual source” estimator, in which an error transport problem, analogous to the discretized transport equation, is solved to acquire an estimate of the error, with a ...
Hart Nathan H., Azmy Yousry Y.
doaj   +1 more source

Well-posedness criteria for one family of boundary value problems

open access: yesҚарағанды университетінің хабаршысы. Математика сериясы, 2023
This paper considers a family of linear two-point boundary value problems for systems of ordinary differential equations. The questions of existence of its solutions are investigated and methods of finding approximate solutions are proposed.
P.B. Abdimanapova, S.M. Temesheva
doaj   +1 more source

Periodic Waves and Ligaments on the Surface of a Viscous Exponentially Stratified Fluid in a Uniform Gravity Field

open access: yesAxioms, 2022
The theory of singular perturbations in a unified formulation is used, for the first time, to study the propagation of two-dimensional periodic perturbations, including capillary and gravitational surface waves and accompanying ligaments in the 10 ...
Yuli D. Chashechkin, Artem A. Ochirov
doaj   +1 more source

Touchdown solutions in general MEMS models

open access: yesAdvances in Nonlinear Analysis, 2023
We study general problems modeling electrostatic microelectromechanical systems devices (Pλ )φ(r,−u′(r))=λ∫0rf(s)g(u(s))ds,r∈(0,1 ...
Clemente Rodrigo   +3 more
doaj   +1 more source

A Singular Value Thresholding Algorithm for Matrix Completion [PDF]

open access: yesSIAM Journal on Optimization, 2008
This paper introduces a novel algorithm to approximate the matrix with minimum nuclear norm among all matrices obeying a set of convex constraints. This problem may be understood as the convex relaxation of a rank minimization problem and arises in many ...
Jian-Feng Cai, E. Candès, Zuowei Shen
semanticscholar   +1 more source

Non-singular solution for anisotropic model by gravitational decoupling in the framework of complete geometric deformation (CGD)

open access: yesThe European Physical Journal C, 2020
We presented a non-singular solution of Einstein’s field equations using gravitational decoupling by means of complete geometric deformation (CGD) in the anisotropic domain for compact star models.
S. Maurya   +2 more
semanticscholar   +1 more source

Exact Fractional Solution by Nucci’s Reduction Approach and New Analytical Propagating Optical Soliton Structures in Fiber-Optics

open access: yesFractal and Fractional, 2022
This study examines the Chen–Lee–Liu dynamical equation, which represents the propagation of optical pulses in optical fibers and plasma. A new extended direct algebraic technique and Nucci’s scheme are used to find new solitary wave profiles. The method
Waqas Ali Faridi   +2 more
doaj   +1 more source

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