Results 31 to 40 of about 37,007 (164)

Subharmonic Solutions in Singular Systems

open access: yesJournal of Differential Equations, 1996
The authors consider the problem of bifurcation of periodic solutions in singular systems of differential equations \[ \varepsilon\dot{u}=f(u)+\varepsilon g(t,u,\varepsilon)\quad u\in\mathbb{R}^n, \] where \(g(t+2,u,\varepsilon)=g(t,u,\varepsilon)\) and \(\dot{u}=f(u)\) has an orbit \(\gamma(t)\) homoclinic to a hyperbolic equilibrium point \(p\).
Battelli, Flaviano, Fečkan, Michal
openaire   +2 more sources

On singular solutions of a multidimensional differential equation of Clairaut-type with power and exponential functions

open access: yesVestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2019
In the theory of ordinary differential equations, the Clairaut equation is well known. This equation is a non-linear differential equation unresolved with respect to the derivative.
Liliya Leonidovna Ryskina
doaj   +1 more source

The Abrikosov vortex in curved space

open access: yesJournal of High Energy Physics, 2021
We study the self-gravitating Abrikosov vortex in curved space with and with-out a (negative) cosmological constant, considering both singular and non-singular solutions with an eye to hairy black holes.
Jan Albert
doaj   +1 more source

PERTURBING SINGULAR SOLUTIONS OF THE GELFAND PROBLEM [PDF]

open access: yesCommunications in Contemporary Mathematics, 2007
The equation -Δu = λeuposed in the unit ball B ⊆ ℝN, with homogeneous Dirichlet condition u|∂B= 0, has the singular solution [Formula: see text] when λ = 2(N - 2). If N ≥ 4 we show that under small deformations of the ball there is a singular solution (u,λ) close to (U,2(N - 2)).
Davila, J., Dupaigne, L.
openaire   +4 more sources

Investigation the soliton solutions of mussel and algae model leading to concentration

open access: yesAlexandria Engineering Journal, 2023
In this study, the abundant families of soliton solutions are constructed for the mussel-algae model which provides information about represents the concentration of algae in the water layer, and mussel biomass of sediment surface in the per square meter.
Warda Islam   +8 more
doaj   +1 more source

Exact solutions and singularities in string theory [PDF]

open access: yesPhysical Review D, 1994
We construct two new classes of exact solutions to string theory which are not of the standard plane wave or gauged WZW type. Many of these solutions have curvature singularities. The first class includes the fundamental string solution, for which the string coupling vanishes near the singularity.
Horowitz, G. T., Tseytlin, A. A.
openaire   +3 more sources

ON SINGULAR SOLUTIONS OF CLAIRAUT EQUATIONS IN THE THEORY OF ORDINARY DIFFERENTIAL AND PARTIAL DERIVATIVE EQUATIONS

open access: yesИзвестия высших учебных заведений. Поволжский регион: Физико-математические науки, 2020
Background. There is no problem in finding a general solution to the ordinary differential Clairaut equation. The corresponding procedure is described in details in the theory of ordinary differential equations.
L. A. Zhidova
doaj   +1 more source

On the singular solutions of nonlinear singular partial differential equations I [PDF]

open access: yesJournal of the Mathematical Society of Japan, 2001
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +4 more sources

On singular solutions for second order delayed differential equations

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2012
Asymptotic properties and estimate of singular solutions (either defined on a finite interval only or trivial in a neighbouhood of infinity) of the second order delay differential equation with p-Laplacian are investigated.
Miroslav Bartusek
doaj   +1 more source

Singularity of solutions to singular SPDEs

open access: yes
Building on the notes [Hai17], we give a sufficient condition for the marginal distribution of the solution of singular SPDEs on the $d$-dimensional torus to be singular with respect to the law of the Gaussian measure induced by the linearised equation.
Hairer, Martin   +2 more
openaire   +3 more sources

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