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存在性定理

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We study several fixed point problems of a class of nonlinear operator,and obtain some new results in partial order Banach space .

研究了一类非线性算子的几个不动点问题,在偏序Banach空间得到了若干新的结果作为其应用,得到了Wm ,q空间中不动点的存在性定理同时,所得的定理改进了一些文献中的主要结

From Poisson matrix, we can observe volume-preserving vector fields. By using Geiges-Gonzalo's existence of contact circle Theorem [3] , we show the existence of volume-preserving circle on3-manifolds which says that every3-manifold admits two linear independent vector fields preserving a same volume form.

通过Poisson矩阵可以观察出保积向量场,再利用Geiges-Gonzalo的接触圆存在性定理[3],我们证明了保积圆的存在性:每个闭的3-流形上都存在两个处处线性无关的保积向量场并且它们的常系数线性组合仍是保积向量场。

At the end of this Chapter, we prove several nonexistent theorems for proper slant immersions, which also generalizes Chen and Tazawas theorem of higher dimension.

本章中我们还证明了几个真Slant浸入的不存在性定理,它是Chen和Tazawa定理在高维中的推广。

At the end of this Chapter, we prove several nonexistent theorems for proper slant immersions, which also generalizes Chen and Tazawa's theorem of higher dimension.

本章中我们还证明了几个真Slant浸入的不存在性定理,它是Chen和Tazawa定理在高维中的推广。

As for the existence of positive solutions, the cone theory and the fixed point index of condensing mapping are employed, and the results of the existence of positive solutions are obtained in the case of superlinear and sublinear. The conclusions extend and improve the existence theorem which Lou Ben-dong extablished in 1996 about the question of Sturm-Liouville of Banach spaces.

三、对于正解存在性问题,我们应用凝聚映射的不动点指数理论,分别在超线性与次线性情形下进行讨论,获得了一些正解存在的结果,主要结果推广和改进了1996年Lou Ben-dong对Banach空间Sturm-Liouville问题所建立的存在性定理

In this thesis, we study two problems: the existence results of solutions for generalized vector quasi-equilibrium problems and Hlder continuity of solutions to generalized vector equilibrium problems. The detailed contents are listed as following:In Hausdorff topological vector space, we discuss the existence results of solutions for three types of generalized vector quasi-equilibrium problem (GVQEP1,(GVQEP2) and (GVQEP3), for short respectively.

本文主要研究了两类问题:广义向量拟平衡问题解的存在性以及广义向量平衡问题解的Hlder连续性,具体内容如下:在Hausdorff向量拓扑空间中,讨论了三类广义向量拟平衡问题(GVQEP1),(GVQEP2)和(GVQEP3)解的存在性定理

We consider the existence of positive solutions of second order impulsive boundary value problems by constructing the appropriate homotopy operator and applying the theory of fixed point index in cones. our results contain the conclusion when f ≥ 0 and J_k = 0([6]). Secondly, we discuss multiple positive solutions of the following impulsive boundary

其次,我们在§2.2中讨论了下面的脉冲微分边值问题多正解的存在性在这一部分的讨论中,利用不动点指数理论,在f既非超线性又非次线性的情形下,得到了两个正解的存在性定理,把文[7]的结果推广到脉冲微分边值

We cosider a class of semilinear elliptic systems with the Neumann boundary value condition by using variational methods, two existences theorem are proved for under critical exponents and critical exponents.

利用变分法讨论了一类带Neumann边界条件的半线性椭圆方程正解的存在性,并得到了在下临界指标时的两个存在性定理

First, the Lyapunov functional and variation of constants method are adopted to study the effect that Sigmoid function and the relation of resistance, capacitance and current in Hopfield neural networks have on the stability of networks. The stability criterion constructed by physics parameters is obtained. Thus how the constrained relation of physics parameters affects the stability of Hopfielf neural networks is clear. Based on the study above, the perturbation model of recurrent neural networks is constructed. And the theorems of the existence of solution of perturbation model are presented.

首先,采用Lyapunov泛函法和常数变易法研究Hopfield神经网络中给出的电阻、电容、电流之间的关系以及Sigmoid函数对网络稳定性的影响规律,得出仅由物理模型参数构成的稳定性判据,从而弄清物理模型参数约束关系对Hopfield神经网络稳定性所起的作用,在此基础上,构建了递归神经网络的扰动模型,并通过讨论扰动模型解的存在性问题,给出递归神经网络扰动模型解的存在性定理

Using this theorem, we proved the existence of traveling wave solutions in cooperative Lotka-Voterra system with stage structure.

本文用这个存在性定理证明了带时滞分年龄段的Lotka-Volterra模型的两个平衡点之间行波解的存在性。

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