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Research on algebraic cycles using cohomology and modulus

Research Project

Project/Area Number 16K05072
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Algebra
Research InstitutionChuo University

Principal Investigator

SATO Kanetomo  中央大学, 理工学部, 教授 (50324398)

Project Period (FY) 2016-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
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)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywords算術的スキーム / 代数的サイクル / 代数的K群 / サイクル類 / Chern類 / エタールコホモロジー / Galoisコホモロジー / 局所・大域原理 / ゼータ関数 / モチビックコホモロジー / セルマー群 / コンパクト台つきコホモロジー / 零で延長したサイクル複体 / コンパクト台付きモチーフコホモロジー / 代数学 / 整数論 / 数論幾何 / コホモロジー
Outline of Final Research Achievements

Through the period of this research from 2016, I have been explored how to simplify the theory of higher algebraic cycles (cycles on products of a scheme and affine spaces, as we use to defined higher Chow groups) and studied cycle classes (and higher characteristic classes) in cohomology groups. In particular, it is a nice achievement to have solved a conjecture raised by Uwe Jannsen in 1989 under some restriction on weights of \'etale cohomology in coefficients (but without any restrictions on motives), concerning a local-principal of Galois cohomology of `S-ramified' Galois groups.

Academic Significance and Societal Importance of the Research Achievements

算術的曲面(整数係数の代数方程式系で定義されたよい図形で2次元の広がりをもつもの)のゼータ関数の s=2 での留数を有限個の素数べき倍による曖昧さを除いて記述できるような例が(何の予想も仮定せずに)構成できるようになった。

Report

(6 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (17 results)

All 2020 2019 2018 2016

All Journal Article (3 results) (of which Open Access: 1 results,  Peer Reviewed: 2 results) Presentation (12 results) (of which Int'l Joint Research: 6 results,  Invited: 12 results) Funded Workshop (2 results)

  • [Journal Article] 算術的曲面のエタールコホモロジーとゼータ関数の値2020

    • Author(s)
      佐藤周友
    • Journal Title

      第65回代数学シンポジウム報告集

      Volume: -

    • Related Report
      2020 Annual Research Report
    • Open Access
  • [Journal Article] On p-adic vanishing cycles of log smooth families2020

    • Author(s)
      Shuji Saito, Kanetomo Sato
    • Journal Title

      Tunisian J. Math.

      Volume: 2 Issue: 2 Pages: 309-335

    • DOI

      10.2140/tunis.2020.2.309

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Chern class and Riemann-Roch theorem for cohomology theory without homotopy invariance2019

    • Author(s)
      Masanori Asakura, Kanetomo Sato, Kei Hagihara
    • Journal Title

      J. Math. Sci. Univ. Tokyo

      Volume: 26 Pages: 1-86

    • NAID

      120006942550

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] 算術的曲面のエタールコホモロジーとゼータ関数の値2020

    • Author(s)
      佐藤周友
    • Organizer
      第65回代数学シンポジウム
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 算術的スキームのエタールコホモロジーと Selmer 群2019

    • Author(s)
      佐藤周友
    • Organizer
      談話会(東京工業大学)
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] Etale cohomology and a zeta-value of arithmetic schemes2019

    • Author(s)
      Kanetomo Sato
    • Organizer
      Regulators in Niseko 2019 (ヒルトンニセコビレッジ)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 算術的曲面のエタールコホモロジーとゼータ値2019

    • Author(s)
      佐藤周友
    • Organizer
      談話会(京都大学)
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] Etale cohomology and a zeta-value of arithmetic schemes2019

    • Author(s)
      Kanetomo Sato
    • Organizer
      Rational Points on Higher Dimensional Varieties (京大数理研)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 算術的曲面のエタールコホモロジーとSelmer群2019

    • Author(s)
      佐藤周友
    • Organizer
      早稲田大学整数論セミナー
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] Etale cohomology and Selmer groups of arithmetic schemes2019

    • Author(s)
      Kanetomo SATO
    • Organizer
      Motives in Tokyo 2019
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] ゼータ関数とコホモロジー2018

    • Author(s)
      佐藤周友
    • Organizer
      中央大学理工学部数学科談話会
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] コンパクト台のモチビックコホモロジーについて2016

    • Author(s)
      佐藤周友
    • Organizer
      談話会
    • Place of Presentation
      京都大学数理解析研究所
    • Year and Date
      2016-12-14
    • Related Report
      2016 Research-status Report
    • Invited
  • [Presentation] Cycle complex and motivic cohomology extended by zero2016

    • Author(s)
      Kanetomo SATO
    • Organizer
      p-adic Metheds in Arimthetic Geometry in Sendai 2016
    • Place of Presentation
      東北大学
    • Year and Date
      2016-11-01
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Cycle complex and motivic cohomology extended by zero2016

    • Author(s)
      Kanetomo SATO
    • Organizer
      日台数論合同研究集会2016
    • Place of Presentation
      国立臺灣大学
    • Year and Date
      2016-09-08
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Cycle complexes extended by zero and with modulus2016

    • Author(s)
      Kanetomo SATO
    • Organizer
      函館数論幾何ワークショップ 2016
    • Place of Presentation
      函館アリーナ
    • Year and Date
      2016-05-31
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Funded Workshop] Regulators in Niseko 20192019

    • Related Report
      2019 Research-status Report
  • [Funded Workshop] Motives in Tokyo 2018 on the occasion of Shuji Saito's 60th birthday2018

    • Related Report
      2017 Research-status Report

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Published: 2016-04-21   Modified: 2022-01-27  

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