|
$
\left\{ \begin{gathered}
(\phi _p (u'(t)))' + q(t)f(t,u(t),u'(t),u'(t)) = 0,t \in (0,1), \hfill \\
u'(0) - \alpha u(\xi ) = 0,u'(1) + \beta u(\eta ) = 0, \hfill \\
\end{gathered} \right.
$
\left\{ \begin{gathered}
(\phi _p (u'(t)))' + q(t)f(t,u(t),u'(t),u'(t)) = 0,t \in (0,1), \hfill \\
u'(0) - \alpha u(\xi ) = 0,u'(1) + \beta u(\eta ) = 0, \hfill \\
\end{gathered} \right.
相似文献
2.
The existence of at least one solution of the following multi-point boundary value problem
|
$
\left\{ \begin{gathered}
[\varphi (x'(t))]' = f(t,x(t),x'(t)),t \in (0,1), \hfill \\
x(0) - \sum\limits_{i = 1}^m {\alpha _i x'(\xi _i ) = 0,} \hfill \\
x'(1) - \sum\limits_{i = 1}^m {\beta _i x(\xi _i ) = 0} \hfill \\
\end{gathered} \right.
$
\left\{ \begin{gathered}
[\varphi (x'(t))]' = f(t,x(t),x'(t)),t \in (0,1), \hfill \\
x(0) - \sum\limits_{i = 1}^m {\alpha _i x'(\xi _i ) = 0,} \hfill \\
x'(1) - \sum\limits_{i = 1}^m {\beta _i x(\xi _i ) = 0} \hfill \\
\end{gathered} \right.
相似文献
3.
This paper deals with the periodic boundary value problem for nonlinear impulsive functional differential equation
|
$
\left\{ \begin{gathered}
x'(t) = f(t,x(t),x(\alpha _1 (t)),...,x(\alpha _n (t)))fora.e.t \in [0,T], \hfill \\
\Delta x(t_k ) = I_k (x(t_k )),k = 1,...,m, \hfill \\
x(0) = x(T). \hfill \\
\end{gathered} \right.
$
\left\{ \begin{gathered}
x'(t) = f(t,x(t),x(\alpha _1 (t)),...,x(\alpha _n (t)))fora.e.t \in [0,T], \hfill \\
\Delta x(t_k ) = I_k (x(t_k )),k = 1,...,m, \hfill \\
x(0) = x(T). \hfill \\
\end{gathered} \right.
相似文献
4.
We consider the three dimensional Cauchy problem for the Laplace equation uxx(x,y,z)+ uyy(x,y,z)+ uzz(x,y,z) = 0, x ∈ R,y ∈ R,0 z ≤ 1, u(x,y,0) = g(x,y), x ∈ R,y ∈ R, uz(x,y,0) = 0, x ∈ R,y ∈ R, where the data is given at z = 0 and a solution is sought in the region x,y ∈ R,0 z 1. The problem is ill-posed, the solution (if it exists) doesn't depend continuously on the initial data. Using Galerkin method and Meyer wavelets, we get the uniform stable wavelet approximate solution. Furthermore, we shall give a recipe for choosing the coarse level resolution. 相似文献
5.
In this paper, two existence theorems are given concerning the following 3-point boundary value problem of second order differential systems with impulses 相似文献
6.
This paper is devoted to the study of the period function for a class of reversible quadratic system
|
$
\begin{gathered}
\dot x = - 2xy, \hfill \\
\dot y = k - 1 - 2kx + \left( {k + 1} \right)x^2 - \tfrac{1}
{2}y^2 . \hfill \\
\end{gathered}
$
\begin{gathered}
\dot x = - 2xy, \hfill \\
\dot y = k - 1 - 2kx + \left( {k + 1} \right)x^2 - \tfrac{1}
{2}y^2 . \hfill \\
\end{gathered}
相似文献
7.
The combinatorial identity is established with the help of the differentiation of the convolution of some function with the sine function. Bibliography:
5 titles.
__________
Translated from Problemy Matematicheskogo Analiza, No. 36, 2007, pp. 65–67. 相似文献
8.
We consider the system
|
$\begin{gathered}
x_{k + 1} = A_k x_k + b_k u_k , \hfill \\
u_{k + 1} = m_k^* x_k ,k = 1,2,..., \hfill \\
\end{gathered}
$\begin{gathered}
x_{k + 1} = A_k x_k + b_k u_k , \hfill \\
u_{k + 1} = m_k^* x_k ,k = 1,2,..., \hfill \\
\end{gathered}
相似文献
9.
Abstract. By using a simple analytic method the following inequalities are proved: 相似文献
10.
Abstract. This paper discusses the singular (n-l, 1) conjugate boundary value problem as fol-lows by using a fixed point index theorem in cones 相似文献
11.
This paper studies the existence of solutions to the singular boundary value problem , where g: (0, 1) × (0, ∞) → ℝ and h: (0, 1) × [0, ∞) → [0, ∞) are continuous. So our nonlinearity may be singular at t = 0, 1 and u = 0 and, moreover, may change sign. The approach is based on an approximation method together with the theory of upper and
lower solutions.
The research is supported by NNSF of China(10301033). 相似文献
12.
In this paper we solve the equations |
相似文献
13.
In this paper we consider a class of nonlinear elliptic problems of the type
|
$
\left\{ \begin{gathered}
- div(a(x,\nabla u)) - div(\Phi (x,u)) = fin\Omega \hfill \\
u = 0on\partial \Omega , \hfill \\
\end{gathered} \right.
$
\left\{ \begin{gathered}
- div(a(x,\nabla u)) - div(\Phi (x,u)) = fin\Omega \hfill \\
u = 0on\partial \Omega , \hfill \\
\end{gathered} \right.
相似文献
14.
This paper investigates the predator-prey system:x=k_1(x-ax)-k(x)y,y=(-k_3 βk(x)ywit.k(x)=k_2x, x≤x, k_2x, x>τ,where α, β, τ; k_1, k_2, k_3 are positive constants.The main results are as follows(i) In case k_3-βk_2τ≥0 system (1) has no limit cycle.(ii) In case k_3-βk_2τ<0, k_1 k_3-βk_2τ>0, and for O<α<<1, system (1) at least has two limitcycles. 相似文献
15.
We consider the first-order Cauchy problem
|
$
\begin{gathered}
\partial _z u + a(z,x,D_x )u = 0,0 < z \leqslant Z, \hfill \\
u|_{z = 0} = u_0 , \hfill \\
\end{gathered}
$
\begin{gathered}
\partial _z u + a(z,x,D_x )u = 0,0 < z \leqslant Z, \hfill \\
u|_{z = 0} = u_0 , \hfill \\
\end{gathered}
相似文献
16.
In this paper, we use the abstract theory of semilinear parabolic equations and a priori estimate techniques to prove the
global existence and uniqueness of smooth solutions to the Cauchy problem for the following system of parabolic equations:
Supported by National Science Fundation of China. 相似文献
17.
Based on the coincidence degree theory of Mawhin, we get a new general existence result for the following higher-order multi-point
boundary value problem at resonance
|
$\begin{gathered}
x^{(n)} (t) = f(t,x(t),x'(t),...,x^{(n - 1)} (t)),t \in (0,1), \hfill \\
x(0) = \sum\limits_{i = 1}^m {a_i x(\xi _i ),x'(0) = ... = x^{(n - 2)} (0) = 0,x^{(n - 1)} (1) = } \sum\limits_{j = 1}^l {\beta _j x^{(n - 1)} (\eta _j )} , \hfill \\
\end{gathered}
$\begin{gathered}
x^{(n)} (t) = f(t,x(t),x'(t),...,x^{(n - 1)} (t)),t \in (0,1), \hfill \\
x(0) = \sum\limits_{i = 1}^m {a_i x(\xi _i ),x'(0) = ... = x^{(n - 2)} (0) = 0,x^{(n - 1)} (1) = } \sum\limits_{j = 1}^l {\beta _j x^{(n - 1)} (\eta _j )} , \hfill \\
\end{gathered}
相似文献
18.
§ 1 IntroductionRecently,certain three-point boundary value problems for nonlinear ordinarydifferential equations have been studied by many authors[1— 6] .However,few papers havebeen published on the same problems for nonlinear functional differential equations.In thispaper,we are concerned with the following second order differential equation with anadvanced argumentu″(t) +λa(t) f(u(h(t) ) ) =0 ,t∈ (0 ,1 ) (1 .1 )with the three-point boundary conditionsu(0 ) =0 ,αu(η) =u(1 ) ,(1 .2 )… 相似文献
19.
The existence of a positive solution for the generalized predator-prey model for two species
|
$
\begin{gathered}
\Delta u + u(a + g(u,v)) = 0in\Omega , \hfill \\
\Delta v + v(d + h(u,v)) = 0in\Omega , \hfill \\
u = v = 0on\partial \Omega , \hfill \\
\end{gathered}
$
\begin{gathered}
\Delta u + u(a + g(u,v)) = 0in\Omega , \hfill \\
\Delta v + v(d + h(u,v)) = 0in\Omega , \hfill \\
u = v = 0on\partial \Omega , \hfill \\
\end{gathered}
相似文献
20.
We study the existence of a solution to the nonlinear fourth-order elastic beam equation with nonhomogeneous boundary conditions
|
$\left\{ \begin{gathered}
u^{(4)} (t) = f(t,u(t),u'(t),u'(t),u'(t)),a.e.t \in [0,1], \hfill \\
u(0) = a,u'(0) = b,u(1) = c,u'(1) = d, \hfill \\
\end{gathered} \right.
$\left\{ \begin{gathered}
u^{(4)} (t) = f(t,u(t),u'(t),u'(t),u'(t)),a.e.t \in [0,1], \hfill \\
u(0) = a,u'(0) = b,u(1) = c,u'(1) = d, \hfill \\
\end{gathered} \right.
相似文献
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