[過去ﾛｸﾞ] Inter-universal geometry と ABC予想 (応援スレ) 65 (1002ﾚｽ)
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528(1): 2022/04/23(土)20:46 ID:MU2asfqc(12/24) AAS
>>527
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＜下記に対訳を作ってみた＞
＜原文＞
P27
§ 2.10. Inter-universality: changes of universe as changes of coordinates
One fundamental aspect of the links [cf. the discussion of §2.7, (i)] ? namely, the Θ-link and log-link ? that occur in inter-universal Teichm¨uller theory is their incompatibility with the ring structures of the rings and schemes that appear in their domains and codomains.
In particular, when one considers the result of transporting an ´etale-like structure such as a Galois group [or ´etale fundamental group] across such a link [cf. the discussion of §2.7, (iii)], one must abandon the interpretation of such a Galois group as a group of automorphisms of some ring [or field] structure [cf. [AbsTopIII], Remark 3.7.7, (i); [IUTchIV], Remarks 3.6.2, 3.6.3], i.e., one must regard such a Galois group as an abstract topological group that is not equipped with any of the “labelling structures” that arise from the relationship between the Galois group and various scheme-theoretic objects.
It is precisely this state of affairs that results in the quite central role played in inter-universal Teichm¨uller theory by results in [mono-]anabelian geometry, i.e., by results concerned with reconstructing various scheme-theoretic structures from an abstract topological group that “just happens” to arise from scheme theory as a Galois group/´etale fundamental group.

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