P20 (iii) は不分岐な v では Weil 予想(Deligne の定理),一般には未解決のウェイト・モノドロミー予想の帰結であり,(iv) は (i) と同様の制限下でL 進エター ルコホモロジーの構成の帰結である.
これらの予想は主に代数幾何学における重さの哲学を反映するものであるから,代数幾何学を通して証明され るものが多いが,保型表現の解析的理論がもっとも強力に定性的な結果をもたらすものとしては,有限性がある. 代数的な Π, R の導手を,すべての有限素点における Πv,WD(Rv) の導手 pmv の積 ?vpmv で定めると,これは有 限積で OF のイデアルとなり,Π と R が対応すれば互いの導手は等しい.Π の導手は Hecke 指標のモジュラス・ 保型形式のレベルにあたるものである. 0093現代数学の系譜 雑談 古典ガロア理論も読む ◆e.a0E5TtKE 2020/04/02(木) 23:01:01.92ID:kD9YEDnI 以上、”ウェイト・モノドロミー予想”とは? について、調べた むずいww(^^; 0094現代数学の系譜 雑談 古典ガロア理論も読む ◆e.a0E5TtKE 2020/04/03(金) 00:16:16.17ID:DyKRdYgChttps://en.wikipedia.org/wiki/Perfectoid_space Perfectoid space (抜粋) In mathematics, perfectoid spaces are adic spaces of special kind, which occur in the study of problems of "mixed characteristic", such as local fields of characteristic zero which have residue fields of characteristic prime p.
A perfectoid field is a complete topological field K whose topology is induced by a nondiscrete valuation of rank 1, such that the Frobenius endomorphism Φ is surjective on K°/p where K° denotes the ring of power-bounded elements.
Perfectoid spaces may be used to (and were invented in order to) compare mixed characteristic situations with purely finite characteristic ones. Technical tools for making this precise are the tilting equivalence and the almost purity theorem. The notions were introduced in 2012 by Peter Scholze.[1]
Contents 1 Tilting equivalence 1.1 Almost purity theorem 2 See also 0095現代数学の系譜 雑談 古典ガロア理論も読む ◆e.a0E5TtKE 2020/04/03(金) 00:43:32.96ID:DyKRdYgC <ウェイト・ モノドロミー予想>
1.伊藤哲史先生>>87-88 「Langlands 対応などへの応用上は, 残された混標数の場合が重要であると考えら れる. しかし, この場合は, 様々な部分的な結果はあるものの, 一般には未解決である」 2.Perfectoid space >>94 「In mathematics, perfectoid spaces are adic spaces of special kind, which occur in the study of problems of "mixed characteristic"」 で、"mixed characteristic"混標数の性質の良い空間を作って そこで、ウェイト・ モノドロミー予想を部分解決したってことかな?(>>31) 3.「ウェイト・モノドロミー予想(weight-monodromy conjecture)とは,Deligneにより1970年の国際数学者会議において提出された予想である([D1]).」 「これは,完備離散付値体上の固有かつ滑らかな代数多様体のl進コホモロジーに定義されたモノドロミー・フィルトレーションの重み(weight)が純であるという予想として定式化されており,」 「"Deligneによるモノドロミー・フィルトレーションの純性予想"とも呼ばれている.」 か。さっぱり分からんが、下記 Kirti Joshi先生のPDFとの関連はついたかな(^^
(参考) https://arxiv.org/pdf/2003.01890.pdf On Mochizuki’s idea of Anabelomorphy and its applications Kirti Joshi 20200305 (抜粋) P61 26 Perfectoid algebraic geometry as an example of anabelomorphy A detailed treatment of assertions of this section will be provided in [DJ] where we establish many results in parallel with classical anabelian geometry. In particular this suggests that the filtered absolute Galois group of a perfectoid field of characteristic zero has non-trivial outer automorphisms which does not respect the ring structure of K.
つづき This is the perfectoid analog of the fact that the absolute Galois group GK of a p-adic field K has autormorphisms which do not preserve the ring structure of K. Now let me explain that the main theorem of [Sch12b] provides the perfectoid analog of anabelomorphy (in all dimensions). Suppose that K is a complete perfectoid field of characteristic zero. Let X/K be a perfectoid variety over K, which I assume to be reasonable, to avoid inane pathologies. Let π1(X/K) be its ´etale site. Let Xb/Kb be its tilt. Then the main theorem of [Sch12b] asserts that Theorem 26.1. The tilting functor provides an equivalence of categories π1(X/K) → π1(Xb/Kb). If L is any untilt of Kb and Y/L is any perfectoid variety with tilt Yb/Lb =〜 Xb/Kb. Then one has π1(X/K) =〜 π1(Y/L) and in particular X/K and Y/L are perfectoid anabelomorphs of each other. In particular one says that X/K and Y/L are anabelomorphic perfectoid varieties over anabelomorphic perfectoid fields K ←→ L. Thus one can envisage proving theorems about X/K by picking an anabelomorphic variety in the anabelomorphism class which is better adapted to the properties (of X/K) which one wishes to study. In some sense Scholze’s proof of the weight monodromy conjecture does precisely this: Scholze replaces the original hypersurface by a (perfectoid) anabelomorphic hypersurface for which the conjecture can be established by other means. (引用終り) 以上