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arXiv 0912.0822math.AG
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抽象投影线

Abstract Projective Lines

Anders Kock

摘要:

我们描述了一个概念(抽象)射影线在一个领域作为一个集配备了一定的一阶结构,和射影线之间的射影作为双射保持这种结构。这里讨论的结构是一个广群的结构,具有某些性质。这导致了一个自然的概念,即投射线束,形成一个堆栈。

英文摘要:

We describe a notion of (abstract) projective line over a field as a set equipped with a certain first order structure, and a projectivity between projective lines as a bijection preserving this structure. The structure in question is that of a groupoid, with certain properties. This leads to a natural notion of bundle of projective lines, forming a stack.

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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