共查询到20条相似文献,搜索用时 46 毫秒
1.
在LF拓扑空间中,引入ω-聚点的概念,这一概念克服了以往聚点的缺点,使得对任意的LF集A,B,A-=A∨Adω和(A∨B)dω=Adω∨Bdω同时成立。 相似文献
2.
LF保序算子空间的ω-连通性 总被引:6,自引:0,他引:6
本文研究了LF保序算子空间的ω-连通性问题.利用LF保序算子空间的ω-远域和ω-连通集等概念,讨论了这些概念的特征性质.同时,给出了拓扑生成的F保序算子空间的若干ω-连通性质. 相似文献
3.
4.
5.
6.
Lω-空间的ωθ-连通性 总被引:1,自引:1,他引:0
研究了Lω-空间的ωθ-连通性问题。利用Lω-空间的的ωθ-闭集和ωθ-连通集等概念,系统讨论了这些概念的特征性质,证明了Lω-空间的ωθ-连通性具有同胚不变性等性质。 相似文献
7.
首先在L-保序算子空间中引入层次ω-开集,讨论了它的一些基本性质;其次用层次ω-开集刻画了(ω_1,ω_2)-连续序同态和(ω_1,ω_2)-开序同态的一些新的特征性质. 相似文献
8.
Lω-空间的拟ω-Lindel(o)f性 总被引:1,自引:0,他引:1
在Lω-空间中引入拟ω-Lindel(o)f性的概念,讨论拟ω-Lindel(o)f性的一些基本性质,给出拟ω-Lindel(o)f性的几个等价刻画. 相似文献
10.
11.
12.
13.
14.
15.
16.
17.
18.
Journal of the Operational Research Society - 相似文献
19.
Irene Benedetti 《Nonlinear Analysis: Theory, Methods & Applications》2011,74(11):3657-3670
A two-point boundary value problem associated to a semilinear multivalued evolution equation is investigated, in reflexive and separable Banach spaces. To this aim, an original method is proposed based on the use of weak topologies and on a suitable continuation principle in Fréchet spaces. Lyapunov-like functions are introduced, for proving the required transversality condition. The linear part can also depend on the state variable x and the discussion comprises the cases of a nonlinearity with sublinear growth in x or of a noncompact valued one. Some applications are given, to the study of periodic and Floquet boundary value problems of partial integro-differential equations and inclusions appearing in dispersal population models. Comparisons are included, with recent related achievements. 相似文献
20.
Relative entropy tuples both in topological and measure-theoretical settings, relative uniformly positive entropy (rel.-u.p.e.)
and relative completely positive entropy (rel.-c.p.e.) are studied. It is shown that a relative topological Pinsker factor
can be deduced by the smallest closed invariant equivalence relation containing the set of relative entropy pairs. A relative
disjointness theorem involving relative topological entropy is proved. Moreover, it is shown that the product of finite rel.-c.p.e.
extensions is also rel.-c.p.e..
The first author is partially supported by NCET, NNSF of China (no. 10401031) and CNRS-K.C.Wong Fellowship.
The second author is supported by the national key project for basic science (973).
The third author is supported by NNSF of China (no. 10401031). 相似文献