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本文对GB型空间进行了若干讨论,得到了一些结果。 设X为Banach空间,X为X的共轭空间,B(X,X)为X到X的所有有界线性算子组成的空间。如果X中的弱收敛序列为弱收敛序列,则称X为GB型空间。Grothendieck.A于1953年证明了l~∞是GB型空间。显然自反空间是GB型空间。 相似文献
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讨论了Bergman型空间H(p,μ)到Bers型空间H_β~∞、小Bers型空间H_(β,0)~∞上的加权复合算子,给出了加权复合算子有界性、紧性、弱紧性的充要条件,以及紧复合算子的角导数准则.本文还讨论了具有闭值域的加权复合算子,得到了一个充分条件. 相似文献
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利用Hardy空间中函数的高阶导数的估计,通过构造一些新的检验函数,运用解析函数的性质与算子理论,给出了从Hardy空间到Zygmund型空间的Riemann—Stieltjes算子的有界性和紧性的特征,获得了若干个充要条件. 相似文献
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Herz型空间中的分数次积分算子的弱型估计 总被引:6,自引:0,他引:6
本文研究了Herz型空间中的分数次积分算子的弱型估计,与陆善镇和杨大春在文献[1]中给出的强型估计一起完整地建立了Herz型空间中的分数次积分算子的Hardy-Littlewood-Sobolev定理. 相似文献
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本文证明了拓扑向量空间E是序列型空间的一个特征为:(1)E的每个序列开集都是开集;(2)取值于E中的任意无穷矩阵(xij)i,j,若对每个j均有limxij=xj,并且limxj=x,则一定存在严格递增序列(ik)和(jk)使得limxikjk=x.作为应用证明了序列型A-空间必是k-空间. 相似文献
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定义了解析Morrey型空间H_K~p,并利用H~p空间范数给出了其刻画.还运用Carleson测度刻画了从H_K~p到帐篷型空间J_K~p(μ)嵌入映射的有界性及紧性,其中,权函数K:[0,∞)→[0,∞)是一个右连续且非递减的函数. 相似文献
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《数学物理学报(A辑)》2015,(6)
引入了QCLkR空间和QCLkS空间的概念,以局部自反原理为工具证明了QCLkR空间和QCLkS空间的对偶关系.利用切片给出了QCLkR空间和QCLkS空间的特征刻画,并讨论了它们与其它凸性和光滑性的关系,所得结果进一步完善了关于Banach空间凸性与光滑性的研究. 相似文献
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We endow the set of complements of a fixed subspace of a projective space with the structure of an affine space, and show that certain lines of such an affine space are affine reguli or cones over affine reguli. Moreover, we apply our concepts to the problem of describing dual spreads. We do not assume that the projective space is finite-dimensional or pappian. 相似文献
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In this article, the authors introduce the Newton-Morrey-Sobolev space on a metric measure space (??, d, μ). The embedding of the Newton-Morrey-Sobolev space into the Hölder space is obtained if ?? supports a weak Poincaré inequality and the measure μ is doubling and satisfies a lower bounded condition. Moreover, in the Ahlfors Q-regular case, a Rellich-Kondrachov type embedding theorem is also obtained. Using the Haj?asz gradient, the authors also introduce the Haj?asz-Morrey-Sobolev spaces, and prove that the Newton-Morrey-Sobolev space coincides with the Haj?asz-Morrey-Sobolev space when μ is doubling and ?? supports a weak Poincaré inequality. In particular, on the Euclidean space \({\mathbb R}^n\) , the authors obtain the coincidence among the Newton-Morrey-Sobolev space, the Haj?asz-Morrey-Sobolev space and the classical Morrey-Sobolev space. Finally, when (??, d) is geometrically doubling and μ a non-negative Radon measure, the boundedness of some modified (fractional) maximal operators on modified Morrey spaces is presented; as an application, when μ is doubling and satisfies some measure decay property, the authors further obtain the boundedness of some (fractional) maximal operators on Morrey spaces, Newton-Morrey-Sobolev spaces and Haj?asz-Morrey-Sobolev spaces. 相似文献
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局部强紧空间的Hoare空间与Smyth空间 总被引:1,自引:0,他引:1
本文主要讨论局部强紧空间的性质,特别是其Hoare空间和Smyth空间的性质,证明了T_0空间为局部强紧空间的当且仅当其Hoare空间为局部强紧空间,局部强紧空间的Smyth空间为C-空间.对于强局部紧空间,我们有类似的结论. 相似文献
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Ralf Kemper 《Applied Categorical Structures》1999,7(3):279-295
We introduce the categories Vec
p
of p-normed vector spaces, Ban
p
of
p
-Banach spaces, AC
p
of
p
-absolutely and TC
p
of
p
-totally convex spaces (0 < p 1). It will be shown that TC
p
(AC
p
) is the Eilenberg–Moore category of Ban
p
(Vec
p
). Then congruence relations on TC
p
(AC
p
)-spaces are studied. There are many differences between TC
p
(AC
p
)-spaces and totally (absolutely) convex spaces (i.e. p = 1) (Pumplün and Röhrl, 1984, 1985), which will become apparent in Section 4. 相似文献
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The category LTS of limit tower spaces is defined and shown to be isomorphic to the category CAP of convergence approach spaces. The full subcategory of LTS determined by the objects satisfying a diagonal axiom due to Cook and Fischer is shown to be isomorphic to the category AP of approach spaces. A family of isomorphisms is also obtained between LTS and certain full subcategories of the category PCS of probabilistic convergence spaces. 相似文献
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Takahide Kurokawa 《Potential Analysis》2011,34(3):261-282
Let S(Rn){\cal S}(R^n) be the Schwartz space on R
n
. For a subspace V ì S(Rn)V\subset {\cal S}(R^n), if a subspace W ì S(Rn)W \subset {\cal S}(R^n) satisfies the condition that S(Rn){\cal S}(R^n) is a direct sum of V and W, then W is called a complementary space of V in S(Rn){\cal S}(R^n). In this article we give complementary spaces of two kinds of the Lizorkin spaces in S(Rn){\cal S}(R^n). 相似文献
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