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arXiv 1204.4282math.FA
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自由和投射巴拿赫格

Free and Projective Banach Lattices

B. de Pagter, A. W. Wickstead

摘要:

在巴拿赫格和压缩格同态范畴中定义并证明了自由巴拿赫格的存在性,并建立了它们的一些基本性质.我们给出了更详细的结果,它们的结构的情况下,只有一个有限数量的发电机,并给出了几个Banach格特征的发电机的数量分别是,一个,有限或可数。我们定义一个Banach格$P$是射影的,如果只要$X$是Banach格,$J$是$X$中的闭理想,$Q:X\to X/J$是商映射,$T:P\to X/J$是线性格同态,$ε>0$存在一个线性格同态$\hat{T}:P\to X$使得(i)$T=Q\circ \hat{T}$和(ii)$\|\hat{T}\|\le (1+ε)\|T\|$ .我们建立了投射巴拿赫格和自由巴拿赫格之间的联系,并描述了几个家庭的巴拿赫格是投射以及证明,有些不是。

英文摘要:

We define and prove the existence of free Banach lattices in the category of Banach lattices and contractive lattice homomorphisms and establish some of their fundamental properties. We give much more detailed results about their structure in the case that there are only a finite number of generators and give several Banach lattice characterizations of the number of generators being, respectively, one, finite or countable. We define a Banach lattice $P$ to be projective if whenever $X$ is a Banach lattice, $J$ a closed ideal in $X$, $Q:X\to X/J$ the quotient map, $T:P\to X/J$ a linear lattice homomorphism and $ε>0$ there is a linear lattice homomorphism $\hat{T}:P\to X$ such that (i) $T=Q\circ \hat{T}$ and (ii) $\|\hat{T}\|\le (1+ε)\|T\|$. We establish the connection between projective Banach lattices and free Banach lattices and describe several families of Banach lattices that are projective as well as proving that some are not.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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