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log crystalline cohomologies of semistable varieties and deformation theory of log varieties in positive characteristic

Research Project

Project/Area Number 18K03224
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 11010:Algebra-related
Research InstitutionTokyo Denki University

Principal Investigator

Nakajima Yukiyoshi  東京電機大学, 工学部, 教授 (80287440)

Project Period (FY) 2018-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Keywords固有正規交差対数多様体 / p進Steenbrink複体 / Hirsch拡大 / 重みフィルトレーション / カップ積 / 対数Calabi-Yau多様体 / Artin-Mazur高さ / 対数Hodge-Witt分解 / 正規交差対数多様体 / 重みフィルトレーション付き複体の積構造 / W_2への持ち上がげ / p進重みフィルトレーション / 対数クリスタル複体 / 対数クリスタルこホモロジー / フィルタードクリスタル複体 / 呼子高さ / 対数多様体 / Wittコホモロジー / Chow群 / 固有半安定対数多様体 / 対数クリスタルコホモロジー / 重み / 積構造 / 擬分裂高さ / 無限小コホモロジー / モノドロミー作用素 / フロベニウス作用素 / 狭両立性 / ホッジドラームスペクトル系列のE_1退化 / 半安定多様体 / 変形理論 / 混標数
Outline of Final Research Achievements

For a proper simple normal crossing log scheme in positive characteristic p , we construct a new weight-filtered complex and we have proved that it has natural product structure. We have proved that the filtration on the log crystalline cohomology induced by this new filtered complex is equal to the filtration on
the log crystalline cohomology induced by the weight-filtered p-adic Steenbrink complex if one ignore the torsion of the log crystalline cohomology (the p-adic Steenbrink complex was constructed by me).
On the other hand, we have given the definition of the log Calabi-Yau variety in characteristic p with finite height and we have proved that it has a log smooth lift over W_2 and that it has the log Hodge-Witt decomposition.

Academic Significance and Societal Importance of the Research Achievements

Grothendieckの壮大な重みのモチーフ論から、様々なコホモロジーの重みフィルトレーションはコホモロジーのカップ積と両立すると予想されている。特に様々なp進コホモロジーに対しては、基礎体が有限体の時には数論的重みフィルトレーションが考えられるが、この両立性は直ちに成立することがわかる。本研究では正標数pの固有正規交差対数多様体に対し、従来構成していたp進Steenbrink複体が対数コホモロジーに誘導するフィルトレーションがカップ積と両立するか否かは非自明だが、新しい重みフィルトレーション付きp進複体を構成することによって、この非自明なことを捻れを無視すれば、両立することを示した。

Report

(7 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (8 results)

All 2022 2021 2019 2018

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 1 results) Presentation (4 results) (of which Int'l Joint Research: 3 results,  Invited: 4 results)

  • [Journal Article] Artin Mazur heights and Yobuko heights of proper log smooth schemes of Cartier type, and Hodge Witt decompositions and Chow groups of quasi-F-split threefolds2022

    • Author(s)
      Yukiyoshi Nakkajima
    • Journal Title

      Journal fur die reine und angewandte Mathematik

      Volume: 787 Pages: 1-44

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Artin-Mazur heights and Yobuko heights of proper log smooth schemes of Cartier type, and Hodge-Witt decompositions and Chow groups of quasi-F-split threefolds2022

    • Author(s)
      Yukiyoshi Nakkajima
    • Journal Title

      Journal fur die reine und mathematik

      Volume: -

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Degenerations of log Hodge de Rham spectral sequences, log Kodaira vanishing theorem in characteristic p > 0 and log weak Lefschetz conjecture for log crystalline cohomologies2021

    • Author(s)
      Yukiyoshi Nakkajima, Fuetaro Yobuko
    • Journal Title

      Europan Journal of Mathematics

      Volume: - Pages: 1537-1615

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] CONGRUENCES OF THE CARDINALITIES OF RATIONAL POINTS OF LOG FANO VARIETIES AND LOG CALABI-YAU VARIETIES OVER THE LOG POINTS OF FINITE FIELDS2019

    • Author(s)
      Yukiyoshi Nakkajima
    • Journal Title

      Journal of Algebra, Number Theory: Advances and Applications

      Volume: 21 Issue: 1 Pages: 1-51

    • DOI

      10.18642/jantaa_7100122080

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Theory of Hirsch weight-filtered log crystalline complex2022

    • Author(s)
      Yukiyoshi Nakkajima
    • Organizer
      p-adic cohomology and arithmetic geometry 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] The action of the crystalline Weil-Deligne group on the infinitesimal cohomology in mixed characteristics2019

    • Author(s)
      Yukiyoshi Nakkajima
    • Organizer
      p-adic cohomology and arithmetic geometry 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Artin-Mazur height, Yobuko height and Hodge-Wittt cohomologies2018

    • Author(s)
      中島幸喜
    • Organizer
      東京大学大学院数理科学研究科理学部数学科・理学部数学科 代数幾何学セミナー
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] Artin-Mazur’s height and Yobuko’s height2018

    • Author(s)
      中島幸喜
    • Organizer
      Hakodate workshop on arithmetic geometry 2018
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited

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Published: 2018-04-23   Modified: 2025-01-30  

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