首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   12篇
  免费   0篇
数学   12篇
  2013年   2篇
  2012年   1篇
  2010年   1篇
  2009年   4篇
  2007年   3篇
  2006年   1篇
排序方式: 共有12条查询结果,搜索用时 31 毫秒
1.
2.
本文讨论半直线上的一类具有非线性边值条件的二阶微分方程.利用变分法和B.Ricceri的三临界点定理得到该方程的多个正解.同时建立该方程由边值条件产生的两个解存在的充分条件.最后给出一个例子来阐释本文的结果.  相似文献   
3.
The method of equivalent variational methods, originally due to Carathéodory for free problems in the calculus of variations is extended to investigate boundary value problems for a class of second order differential equations on the half-line. Some applications are presented to illustrate the potential of this method.  相似文献   
4.
We give a nearfield-free definition of some finite and infinite incidence systems by means of half-points and half-lines and show that they are projective planes. We determine a planar ternary ring for these planes and use it to determine the full collineation group and to demonstrate some embeddings of these planes among themselves. We show that these planes include all finite regular Hughes planes and many infinite ones. We also show that PG(3, q) embeds in Hu(q 4) (and show infinite versions of this embedding). Dan Hughes 80th Birthday.  相似文献   
5.
讨论了半直线上非线性耦合系统边值问题,应用Leggett-Williams不动点定理,得到了三个正解的存在性结果,推广并改进了现有结果.  相似文献   
6.
7.
This paper is concerned with an operator equation on half-line. Some theorems for the existence of its positive solutions are obtained by using the Krasnosel'skii-Guo theorem on cone expansion and compression in a special function space.  相似文献   
8.
In this paper, we study the multiplicity of solutions for second-order impulsive differential equation with a parameter on the half-line. By using a variational method and a three critical points theorem, we give some new criteria to guarantee that the impulsive problem has at least three classical solutions. Also an example is given in this paper to illustrate the main results.  相似文献   
9.
In this paper, we study the existence of multiple positive solutions of boundary value problems for second-order discrete equations Δ2 x(n ? 1) ? pΔx(n ? 1) ? qx(n ? 1)+f(n, x(n)) = 0, n ∈ {1,2,…}, αx(0) ? βΔx(0) = 0, x(∞) = 0. The proofs are based on the fixed point theorem in Fréchet space (see Agarwal and O'Regan, 2001, Cone compression and expansion and fixed point theorems in Fréchet spaces with application, Journal of Differential Equations, 171, 412–42).  相似文献   
10.
利用Avery-Peterson不动点定理,在射线上讨论了如下p-Laplacian算子方程多点边值问题,{(φp(u′))′(t)+q(t)f(t,u(t),u′(t))=0,0相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号