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arXiv 2007.15069math.AG
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MW-同伦层与Morel广义转移

MW-homotopy sheaves and Morel generalized transfers

Niels Feld

摘要:

本文探讨了Morel关于同伦层压缩上的Bass-Tate转移的一个猜想,并证明了该猜想在有理系数下成立。此外,我们还研究了(压缩)同伦层、Morel广义转移层和MW-同伦层之间的关系,证明了范畴的一个等价性。作为应用,我们描述了遗忘MW-转移的正则函子的本质象,并利用这些结果讨论了Bachmann和Yakerson关于A^1-同伦的保守性猜想。

英文摘要:

We explore a conjecture of Morel about the Bass-Tate transfers defined on the contraction of a homotopy sheaf and prove that the conjecture is true with rational coefficients. Moreover, we study the relations between (contracted) homotopy sheaves, sheaves with Morel generalized transfers and MW-homotopy sheaves, and prove an equivalence of categories. As applications, we describe the essential image of the canonical functor that forgets MW-transfers and use theses results to discuss the conservativity conjecture in A^1-homotopy due to Bachmann and Yakerson.

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