Results 21 to 30 of about 1,424,011 (281)

Dirichlet Boundary Value Problems of the Ernst Equation [PDF]

open access: yes, 2001
We demonstrate how the solution to an exterior Dirichlet boundary value problem of the axisymmetric, stationary Einstein equations can be found in terms of generalized solutions of the Backlund type.
Andreas Kleinwächter   +32 more
core   +4 more sources

Blowup Analysis for a Semilinear Parabolic System with Nonlocal Boundary Condition

open access: yesBoundary Value Problems, 2009
This paper deals with the properties of positive solutions to a semilinear parabolic system with nonlocal boundary condition. We first give the criteria for finite time blowup or global existence, which shows the important influence of nonlocal boundary.
Zhaoyin Xiang, Yulan Wang
doaj   +1 more source

Existence of nonconstant periodic solutions for p(t) $p(t)$-Laplacian Hamiltonian system

open access: yesBoundary Value Problems, 2019
The purpose of this paper is to consider the existence of periodic solutions for the p(t) $p(t)$-Laplacian Hamiltonian system. Some results are obtained by using the least action principle and the minimax methods.
Yuanfang Ru, Fanglei Wang
doaj   +1 more source

Entire Bounded Solutions for a Class of Quasilinear Elliptic Equations

open access: yesBoundary Value Problems, 2007
We consider the problem −div(|∇u|p−2∇u)=a(x)(um+λun), x∈ℝN, N≥3, where ...
Zuodong Yang, Bing Xu
doaj   +1 more source

Dynamics and stationary distribution of a stochastic SIRS epidemic model with a general incidence and immunity

open access: yesBoundary Value Problems, 2022
Infected individuals often obtain or lose immunity after recovery in medical studies. To solve the problem, this paper proposes a stochastic SIRS epidemic model with a general incidence rate and partial immunity. Through an appropriate Lyapunov function,
Tao Chen, Zhiming Li
doaj   +1 more source

Ground state solutions for Hamiltonian elliptic systems with super or asymptotically quadratic nonlinearity

open access: yesBoundary Value Problems, 2019
This article concerns the Hamiltonian elliptic system: {−Δφ+V(x)φ=Gψ(x,φ,ψ)in RN,−Δψ+V(x)ψ=Gφ(x,φ,ψ)in RN,φ,ψ∈H1(RN). $$ \textstyle\begin{cases} -\Delta \varphi +V(x)\varphi =G_{\psi }(x,\varphi ,\psi ) & \mbox{in } \mathbb {R}^{N}, \\ -\Delta \psi +V(x)\
Yubo He, Dongdong Qin, Dongdong Chen
doaj   +1 more source

Initial boundary value problems for Einstein's field equations and geometric uniqueness [PDF]

open access: yes, 2009
While there exist now formulations of initial boundary value problems for Einstein's field equations which are well posed and preserve constraints and gauge conditions, the question of geometric uniqueness remains unresolved. For two different approaches
H. Friedrich   +15 more
core   +2 more sources

The Existence of Countably Many Positive Solutions for Nonlinear nth-Order Three-Point Boundary Value Problems

open access: yesBoundary Value Problems, 2009
We consider the existence of countably many positive solutions for nonlinear nth-order three-point boundary value problem u(n)(t)+a(t)f(u(t))=0, t∈(0,1), u(0)=αu(η), u′(0)=⋯=u(n−2)(0)=0, u(1)=βu(η),
Yanping Guo, Yude Ji
doaj   +1 more source

Global dynamics for an SVEIR epidemic model with diffusion and nonlinear incidence rate

open access: yesBoundary Value Problems, 2022
In this paper, we investigate an SVEIR epidemic model with reaction–diffusion and nonlinear incidence. We establish the well-posedness of the solutions and the basic reproduction number R 0 $\mathfrak{R}_{0}$ .
Jinhu Xu
doaj   +1 more source

Abstract Definite Boundary Value Problems [PDF]

open access: yesProceedings of the National Academy of Sciences, 1940
Not ...
openaire   +2 more sources

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