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arXiv 0706.0579math.AG
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戴环空间上的仿射结构与格式

Affine Structures on a Ringed Space and Schemes

Feng-Wen An

摘要:

本文首先引入了戴环空间上仿射结构的概念,然后得到了仿射结构的几个性质。戴环空间上的仿射结构主要产生于数域上代数格式的复解析空间,它的行为类似于光滑流形上的微分结构。正如对微分流形所做的那样,我们将使用仿射变换的伪群来定义戴环空间上的仿射图谱。一个空间上的地图集被称为是一个仿射结构,如果它是最大的。仿射结构是容许的,如果在基础空间上存在层,使得它们在所有仿射图上重合,这些图实际上是一个概型的仿射开集。严格地说,如果在某些特殊情况下,如代数概型的解析空间中,仿射结构起作用,则概型被定义为具有特定仿射结构的戴环空间。特别地,利用空间上的仿射结构整体,分别得到了两个空间同胚和两个概型同构的充要条件,这是本文的两个主要定理。由此可见,空间和概型上的仿射结构整体作为局部数据,分别编码和反映了空间和概型的全局性质。

英文摘要:

In this paper we will first introduce the notion of affine structures on a ringed space and then obtain several properties. Affine structures on a ringed space, arising mainly from complex analytical spaces of algebraic schemes over number fields, behave like differential structures on a smooth manifold. As one does for differential manifolds, we will use pseudogroups of affine transformations to define affine atlases on a ringed space. An atlas on a space is said to be an affine structure if it is maximal. An affine structure is admissible if there is a sheaf on the underlying space such that they are coincide on all affine charts, which are in deed affine open sets of a scheme. In a rigour manner, a scheme is defined to be a ringed space with a specified affine structure if the affine structures are in action in some special cases such as analytical spaces of algebraic schemes. Particularly, by the whole of affine structures on a space, we will obtain respectively necessary and sufficient conditions that two spaces are homeomorphic and that two schemes are isomorphic, which are the two main theorems of the paper. It follows that the whole of affine structures on a space and a scheme, as local data, encode and reflect the global properties of the space and the scheme, respectively.

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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