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Chern classes with modulus and higher structures of algebraic cycles

Research Project

Project/Area Number 18K13382
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 11010:Algebra-related
Research InstitutionTohoku University

Principal Investigator

KAI Wataru  東北大学, 理学研究科, 助教 (00804296)

Project Period (FY) 2018-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Keywords代数的サイクル / モジュラス / 移動補題 / 陳類 / 相対K群 / 高次周群 / 素元 / Green-Taoの定理 / Hasse原理 / Chow群 / K群 / 数体の素元 / 組合せ論 / 三井の素数定理 / モジュラス付きモチーフ / 素数定理 / 有理点 / 多様体 / 導来幾何 / プリズム / Hodge-Witt層 / 素数 / Green-Tao-Zieglerの定理 / K理論 / 数体 / アフィン曲線 / Fourier解析 / ゼータ関数 / 高次Chow群 / モチーフ / スペクトル系列 / ガンマ空間 / Chern類 / 高次圏 / ホモトピー / K群・K理論 / モジュラス付き代数的サイクル / トポロジー
Outline of Final Research Achievements

The main interest has been to connect the higher Chow group with modulus and relative higher K-groups. In joint work with Ryomei Iwasa, we showed a comparison of the Chow group with modulus and the relative K_0 of affine schemes. We sought to deepen it by refining the construction of Chern classes with modulus, but we didn't manage to do so within this period. In other directions, we established an alternative proof of Suslin's moving lemma and applied it to the Chow group with modulus. In joint work with Shusuke Otabe and Takao Yamazaki, we studied P^1 invariant sheaves with transfers. In joint work with Masato Mimura, Akihiro Munemasa, Shin-ichiro Seki and Kiyoto Yoshino, we proved the number field analog of the Green-Tao theorem. We went on to prove finer results about how prime elements are distributed in the integer ring of a given number field.

Academic Significance and Societal Importance of the Research Achievements

モジュラス付き代数的サイクルは、A^1 不変な現象に適用範囲を限定しない、より一般のモチーフ理論の構築という昨今の研究の流れの嚆矢となる試みである。この枠組みでの諸現象の探究は、より一般のモチーフ理論がどう構築されるべきか一定の示唆を与えるため、学界から関心を寄せられている。
一方、数体の素元の性質の殆どは、翻訳して素数の性質としても理解でき、もとより素数は人々(少なくとも、数学者)の関心を集めてやまないものである。多項式の素数値に関するいわゆるSchinzel予想にも広い意味で関わっていて素数の理論の大きな流れに沿った研究の方向だと思う。

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

    (17 results)

All 2024 2023 2022 2021 2020 2019 2018 Other

All Int'l Joint Research (6 results) Journal Article (5 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 5 results,  Open Access: 5 results) Presentation (6 results) (of which Int'l Joint Research: 5 results,  Invited: 6 results)

  • [Int'l Joint Research] ミラノ大学(イタリア)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] University of Milan(イタリア)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] University of Copenhagen(デンマーク)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] University of Milan(イタリア)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] Tata Institute of Fundamental Research(インド)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] Universitaet Regensburg(ドイツ)

    • Related Report
      2018 Research-status Report
  • [Journal Article] Unramified logarithmic Hodge-Witt cohomology and -invariance2022

    • Author(s)
      Kai Wataru、Otabe Shusuke、Yamazaki Takao
    • Journal Title

      Forum of Mathematics, Sigma

      Volume: 10

    • DOI

      10.1017/fms.2022.6

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Isomorphism up to bounded torsion between relative K_0-groups and Chow groups with modulus2020

    • Author(s)
      Ryomei Iwasa and Wataru Kai
    • Journal Title

      Journal of the Institute of Mathematics of Jussieu

      Volume: - Issue: 6 Pages: 1947-1968

    • DOI

      10.1017/s1474748020000055

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A moving lemma for algebraic cycles with modulus and contravariance2019

    • Author(s)
      Wataru Kai
    • Journal Title

      International Mathematics Research Notices

      Volume: - Issue: 1 Pages: 475-522

    • DOI

      10.1093/imrn/rnz018

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Chern classes with modulus2019

    • Author(s)
      Ryomei Iwasa and Wataru Kai
    • Journal Title

      Nagoya Mathematical Journal

      Volume: 236 Pages: 84-133

    • DOI

      10.1017/nmj.2018.52

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Notes on a p-adic exponential map for the Picard group2019

    • Author(s)
      Wataru Kai
    • Journal Title

      Tokyo Journal of Mathematics

      Volume: 42-1 Issue: 1 Pages: 35-49

    • DOI

      10.3836/tjm/1502179262

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Linear patterns of prime elements in number fields2024

    • Author(s)
      Wataru Kai
    • Organizer
      New Directions in Rational Points
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] The Green-Tao Theorem for number fields and beyond2023

    • Author(s)
      Wataru Kai
    • Organizer
      Gruppen und topologische Gruppen
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Unramified cohomology and P^1-invariance2022

    • Author(s)
      Takao Yamazaki
    • Organizer
      Motives, quadratic forms and arithmetic
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 数体に対するGreen-Taoの定理2021

    • Author(s)
      甲斐亘
    • Organizer
      代数的整数論とその周辺2021
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] Algebraic cycles with modulus and some relative K-groups2019

    • Author(s)
      甲斐亘
    • Organizer
      The Asia-Australia Algebra Conference
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Algebraic cycles with modulus and some relative K-groups2018

    • Author(s)
      甲斐亘
    • Organizer
      p-adic chomology and 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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