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   4篇
  完全免费   3篇
  数学   7篇
  2022年   1篇
  2020年   1篇
  2019年   1篇
  2016年   1篇
  2013年   2篇
  1989年   1篇
排序方式: 共有7条查询结果,搜索用时 109 毫秒
1
1.
Implicit-degrees and circumferences   总被引:2,自引:0,他引:2  
In this paper, we introduce a new concept — implicit-degrees of vertices of graphs. Related to this concept, a new definition for the closure of a graph is introduced. This closure is obtained by recursively joining pairs of nonadjacent vertices whose implicit-degree sum is at least the order of the graph. A criterion for deciding whether a graph is hamiltonian from its closure is obtained. Two other important results concerning the implicit-degrees of vertices and circumferences of graphs are presented.  相似文献
2.
Let E be an atomic Banach lattice and X be a separable Banach lattice. In this paper we show that ${E \hat{\otimes}_{|\pi|} X,}$ the positive projective tensor product of E and X, has the complete continuity property (respectively, the analytic complete continuity property) if and only if both E and X have the same property. We also discuss the inheritance of type I- and type II-complete continuity properties by ${E \hat{\otimes}_{|\pi|} X}$ from E and X.  相似文献
3.
In this paper, we establish the Hyers–Ulam stability of delay differential equations in the form of with a Lipschitz condition on a bounded and closed interval by using successive approximation method.  相似文献
4.
In the literature, many researchers have studied Lotka‐Volterra (L‐V) models for different types of studies. In order to continue the study, we consider a fractional‐order L‐V model involving three different species in the Atangana‐Baleanu‐Caputo (ABC) sense of fractional derivative. This new model has potentials for a large number of research‐oriented studies. The first point that arises is whether the new model has a solution or not. Therefore, to answer this question, we consider the existence and uniqueness (EU) of the solutions and then Hyers‐Ulam (HU) stability for the proposed L‐V model.  相似文献
5.
本文利用参数变易法研究了时间尺度上二阶变系数线性动力学方程的解与Ulam稳定性问题. 特别地,在不同的系数情形下建立了二阶常系数线性动力学方程的Ulam稳定性理论.  相似文献
6.
7.
在本文中我们研究了正交?程的稳定性, 其与Wlodzimierz Fechner和Justyna Sikorska在2010年得出的结果密切相关. 本文的差异性在于考虑目标空间赋予$\beta$-齐次范数和拟范数. 通过克服$\beta$-齐次范数和拟范数的瓶颈,得到了新的结果.  相似文献
1
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