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A new approach to Grothendieck's variational Hodge conjecture

Research Project

Project/Area Number 17K18723
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Research Field Algebra, Geometry, and related fields
Research InstitutionThe University of Tokyo (2018-2019)
Tokyo Institute of Technology (2017)

Principal Investigator

Saito Shuji  東京大学, 大学院数理科学研究科, 教授 (50153804)

Project Period (FY) 2017-06-30 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2018: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2017: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
KeywordsK理論 / リジッド解析空間 / リジッド解析 / ホッジ予想 / リジッド解析幾何 / モチーフ理論
Outline of Final Research Achievements

Hodge conjecture is one of the most important open problems in mathematics. It implies Grothendieck's variational Hodge conjecture while they are equivalent for abelian varieties. By a recent development, the latter conjecture is reduced to the so-called the algebrization problem of algebraic K-theory of formal schemes. This is a vast generalization of Grothendieck's formal existence theorem and is wide open. In our research program, we propose a completely new approach to this problem by introducing a new K-theory for rigid analytic spaces, which brings about possibilities to apply the rigid analytic geometry to the algebrization problem.

Academic Significance and Societal Importance of the Research Achievements

ホッジ予想が数学の最重要問題のひとつであることに異論はない.クレイ研究所がミレニアム問題の一つとして100万米ドルの懸賞金をかけたこともその理由の一つである.変動的ホッジ予想は,ホッジ予想よりは弱い予想であるが,これに対する新たな結果はホッヂ予想に対する重要な進展をもたらすことが期待される.最近の進展によりこの問題は,形式的スキームの代数的K群にたいする代数化の問題に帰着されたが.これについての一般的アプローチは知られていない.本研究の意義は,リジッド解析空間のK理論を構築することにより, リジッド解析的手法をこの難問に適用するという全く新しいアイデアにもとずくアプローチを与えたことにある.

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (36 results)

All 2020 2019 2018 2017 Other

All Int'l Joint Research (4 results) Journal Article (14 results) (of which Int'l Joint Research: 14 results,  Peer Reviewed: 14 results) Presentation (14 results) (of which Int'l Joint Research: 13 results,  Invited: 14 results) Book (1 results) Remarks (2 results) Funded Workshop (1 results)

  • [Int'l Joint Research] University of Regensburg(ドイツ)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] University of Regensburg(ドイツ)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] IMJ-PRG(フランス)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] University of Regensburg(ドイツ)

    • Related Report
      2017 Research-status Report
  • [Journal Article] On p-adic vanishing cycles of log smooth families2020

    • Author(s)
      S. Saito, K. Sato
    • Journal Title

      Tunisian J. Math.

      Volume: 2 Pages: 309-335

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Purity of reciprocity sheaves2020

    • Author(s)
      S. Saito
    • Journal Title

      Adv. in Math.

      Volume: 印刷中 Pages: 107067-107067

    • DOI

      10.1016/j.aim.2020.107067

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Towards a non-archimedean analytic analog of the Bass-Quillen conjecture2020

    • Author(s)
      M. Kerz, S. Saito and G. Tamme
    • Journal Title

      J. Inst. Math. Jussieu

      Volume: 印刷中 Issue: 6 Pages: 1931-1946

    • DOI

      10.1017/s147474801900001x

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] K-theory of non-archimedean rings I2020

    • Author(s)
      M. Kerz, S. Saito and G. Tamme
    • Journal Title

      Documenta Math.

      Volume: to appear

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Smooth blowup square for motives with modulus2020

    • Author(s)
      S. Kelly and S. Saito
    • Journal Title

      Bulletin of the Polish Academy of Sciences - Mathematics

      Volume: to appear

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Relative cycles with moduli and regulator maps2019

    • Author(s)
      F. Binda and S. Saito
    • Journal Title

      J. Inst. Math. Jussieu

      Volume: 18 Issue: 06 Pages: 1233-1293

    • DOI

      10.1017/s1474748017000391

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Towards a non-archimedean analytic analog of the Bass-Quillen conjecture2019

    • Author(s)
      M. Kerz, S. Saito and G. Tamme
    • Journal Title

      J. Inst. Math. Jussieu

      Volume: to apppear

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Relative cycles with moduli and regulator maps2019

    • Author(s)
      F. Binda and S. Saito
    • Journal Title

      J. Inst. Math. Jussieu

      Volume: to appear

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] On p-adic vanishing cycles of log smooth families2019

    • Author(s)
      S. Saito and K. Sato
    • Journal Title

      Tunisian J. Math.

      Volume: to appear

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Duality for relative logarithmic de Rham-Witt sheaves and wildly ramified class field theory over finite fields2018

    • Author(s)
      U. Jannsen, S. Saito and Y. Zhao
    • Journal Title

      Compositio Math.

      Volume: 154

    • Related Report
      2018 Research-status Report 2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Higher Chow groups with modulues and relative Milnor K-theory2018

    • Author(s)
      K. R"ulling and S. Saito
    • Journal Title

      Trans. AMS.

      Volume: 370

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Higher Chow groups with modulues and relative Milnor K-theory2018

    • Author(s)
      K. Ruelling and S. Saito
    • Journal Title

      Trans. AMS

      Volume: 370 Pages: 987-1043

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Relative cycles with moduli and regulator maps2018

    • Author(s)
      F. Binda and S. Saito
    • Journal Title

      J. Inst. Math. Jussieu

      Volume: 印刷中

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Weight homology of motives2017

    • Author(s)
      S. Kelly and S. Saito
    • Journal Title

      Internatinal Math. Research Notices

      Volume: 13 Pages: 3938-3984

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Theory of motives and ramification theory2020

    • Author(s)
      Shuji Saito
    • Organizer
      Enriques Lecture, Seminar of Geometry and Algebra, University of Milano
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] Rigid analytic K-theory and p-adic Chern characters2019

    • Author(s)
      Shuji Saito
    • Organizer
      Tokyo-Princeton at Komaba
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Theory of motives with modulus2019

    • Author(s)
      Shuji Saito
    • Organizer
      Arithmetic and Algebraic Geometry 2019 on the occasion of Prof. Terasoma's 60-th birthdUniversity of Tokyo, Tokyo Japanay,
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Rigid analytic K-theory2018

    • Author(s)
      Shuji Saito
    • Organizer
      Arithmetic and Analysis, Conference on the occasion of Christopher Deninger's 60th birthday
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Rigid analytic K-theory2018

    • Author(s)
      Shuji Saito
    • Organizer
      Motivic homotopy theory and refined enumerative geometry
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Rigid analytic K-theory and p-adic Chern characters2018

    • Author(s)
      Shuji Saito
    • Organizer
      The conference "Arithmetic Geometry : l-adic and p-adic aspects
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Rigid analytic K-theory and $p$-adic Chern characters2018

    • Author(s)
      Shuji Saito
    • Organizer
      A conference `Geometry: Local and Global' on the occasion of Prof. V. Srinivas's 60-th birthday
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Theory of motives with modulus2018

    • Author(s)
      Shuji Saito
    • Organizer
      Arithmetic and Algebraic Geometry 2019 on the occasion of Prof. Terasoma's 60-th birthday
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Rigid analytic K-theory and p-adic Chern characters2018

    • Author(s)
      Shuji Saito
    • Organizer
      Workshop on arithmetic geometry, Tokyo-Princeton at Komaba
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Rigid analytic K-theory2018

    • Author(s)
      Shuji Saito
    • Organizer
      Arithmetic and Analysis on the occasion of Christopher Deninger’s 60th birthday a conference
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Purity of reciprocity sheaves and motive of modulus2017

    • Author(s)
      Shuji Saito
    • Organizer
      Algebro-geometric and homotopical methods
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Rigid analytic K-theory2017

    • Author(s)
      Shuji Saito
    • Organizer
      K-theory in algebraic geometry and number theory
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Motives with modulus and cdh descent for reciprocity sheaves2017

    • Author(s)
      Shuji Saito
    • Organizer
      Algebraic K-theory and Arithmetic
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Motivic interpretation of Artin conductors2017

    • Author(s)
      Shuji Saito
    • Organizer
      Conference on Algebraic Geometry and Number Theory on the occasion of Jean-Louis Colliot-Thelene's 70th birthday
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Book] Desingularization: Invariants and Strategy: Application to Dimension 22020

    • Author(s)
      V. Cossart, U. Jannsen, S. Saito
    • Publisher
      Lecture Notes in Mathematics, Springer
    • Related Report
      2019 Annual Research Report
  • [Remarks] Shuji Saito's Home Page

    • URL

      http://www.lcv.ne.jp/~smaki/ja/index.html

    • Related Report
      2019 Annual Research Report
  • [Remarks] 斎藤秀司ホームページ

    • URL

      http://www.lcv.ne.jp/~smaki/ja/index.html

    • Related Report
      2017 Research-status Report
  • [Funded Workshop] Moitves in Tokyo, 20192019

    • Related Report
      2018 Research-status Report

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Published: 2017-07-21   Modified: 2021-02-19  

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