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arXiv 2009.00396math.AGmath.KT
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关于实平展上同调的有限性结果

On some finiteness results in real étale cohomology

Fangzhou Jin

摘要:

我们证明了有限维拟紧拟分离格式的实平展上同调的可构造性条件与拓扑学中自然产生的可构造性概念一致.作为应用,我们证明了导出的直象函子在一定的假设下保持可构造性,并计算了合理格式下可构造有理稳定运动同伦范畴的Grothendieck群.本文证明了可构造的实数层的通有基变换性质,并推导出有理动机谱和$b$ -层的通有基变换性质.

英文摘要:

We show that for quasi-compact quasi-separated schemes of finite dimension, the constructibility condition in real étale cohomology agrees with a notion of constructibility arising naturally from topology. As application we prove that the derived direct image functor preserves constructibility under some assumptions, and compute the Grothendieck group of the constructible rational stable motivic homotopy category for reasonable schemes. We prove the generic base change property for constructible real étale sheaves, and deduce the same property for rational motivic spectra and $b$-sheaves.

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