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arXiv 2304.04872math.AGmath.CO
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仿射概形与层的幂等化

Idempotentization of Affine Schemes and Sheaves

Félix Baril Boudreau, Cristhian Garay

AI总结:

本文引入幂等化过程,将仿射概形及其上的Zariski层关联至幂等半环结构,并证明其独立于覆盖选择,在Noetherian情形下可恢复全局截面,同时揭示了交换半环理想结构的拓扑收缩性质。

摘要:

在本文中,我们引入了幂等化过程,该过程在哲学和数学上与现代解析化和热带化有一些相似之处。幂等化将任何仿射概形,相对于由显著仿射开子概形组成的固定覆盖,关联到其自身的幂等版本。一旦固定此覆盖,我们便能函子式地将环或模的 Zariski 层关联到幂等半环层或幂等半模层。我们证明幂等化独立于所选的覆盖,并且在 Noetherian 情形下,结构层的幂等化能恢复全局截面。支撑我们形式化体系的是对序论对象的子对象格的组合反射,这些格被视为源自交换代数的格。这对交换半环 $S$ 的可减理想半环具有拓扑推论:一方面,对于粗下拓扑,它是 $S$ 的同余关系半环的拓扑收缩核。另一方面,对于粗上拓扑,它是 $S$ 的理想半环的拓扑收缩核。

英文摘要:

In this article, we introduce the idempotentization process, which bears some philosophical and mathematical similarities with modern analytification and tropicalization. Idempotentization associates to any affine scheme an idempotent version of itself with respect to a fixed covering by distinguished affine open subschemes. Once this cover is fixed, we can functorially associate a Zariski sheaf of rings or modules to a sheaf of idempotent semiring or a sheaf of idempotent semimodules. We show that idempotentization is independent of the chosen cover and in the Noetherian case, the idempotentization of the structure sheaf recovers the global sections. Underlying our formalism is a combinatorial reflection of lattices of subobjects of ordered-theoretic objects seen as lattices coming from commutative algebra. This has topological consequences for the semiring of subtractive ideals of a commutative semiring $S$: On one hand, it is a topological retract of the semiring of congruence relations of $S$ for the coarse lower topology. On the other hand, it is a topological retract of the semiring of ideals of $S$ for the coarse upper topology.

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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