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Combinatorial constructions of invariants of manifolds with group actions

Research Project

Project/Area Number 17K14196
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Geometry
Research InstitutionOkayama University of Science

Principal Investigator

Kuroki Shintaro  岡山理科大学, 理学部, 准教授 (90433309)

Project Period (FY) 2017-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2020: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2019: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2018: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2017: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Keywords同変コホモロジー / GKM理論 / 変換群論 / トーラス作用 / オービフォールド / flag 多様体 / GKMグラフ / トーリック超ケーラー多様体 / GKM多様体 / 同変ベクトル束 / 旗Bott塔 / Gale dual / トーラスオービフォールド / 旗Bott多様体 / orbit closure / トーリックトポロジー / 群作用の拡張 / 複雑性1のトーラス多様体
Outline of Final Research Achievements

From 2017 to 2021, we studied manifolds with group actions mainly from the viewpoint of graphs. During this period, we mainly worked with a research group in Korea on flag Bott manifolds which are defined by iterated bundles of flag manifolds, We computed their equivariant cohomology rings and GKM graphs. We also considered the question of the topology of the orbit closure for the extended noncompact torus actions on flag Bott manifolds. This research has recently begun to study by the other researchers. We also studied the equivariant cohomology of torus orbifolds and published it in a journal.

Academic Significance and Societal Importance of the Research Achievements

群の作用を持つ多様体は、対称性の高い空間として非常にきれいな性質を持つ場合が多い。近年では、そのような多様体と他分野(特に組み合わせ論)との関係が見つかり、研究が盛んになっている。組み合わせ論という素朴な分野との結びつきが現れたので今後社会の役に立つ研究につながる可能性が期待される。
本研究では、そのような対象の最も基本的な不変量である同変コホモロジーに関する研究を行い、flag Bott多様体とトーラスオービフォールドの同変コホモロジーを決定した。トーラスオービフォールドに関しては、GL(n,R)の表現とも関係があることが分かった。これは研究当初は想像もしていなかった結果である。

Report

(6 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (53 results)

All 2022 2021 2020 2019 2018 2017 Other

All Int'l Joint Research (15 results) Journal Article (8 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 4 results,  Open Access: 1 results) Presentation (19 results) (of which Int'l Joint Research: 12 results,  Invited: 17 results) Remarks (6 results) Funded Workshop (5 results)

  • [Int'l Joint Research] Indian Institute of Technology(インド)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] University of Toronto(カナダ)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Higher School of Economy(ロシア連邦)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Xi'an jiaotong liverpool university(中国)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] KIAS(韓国)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Indian Institute of Technology Madras(インド)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] RUDN(ロシア連邦)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] University of Toronto(カナダ)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Moscow State University/Higher School of Economy/RUDN(ロシア連邦)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] IBS-CGP/Ajou University/Sungkyunkwan University(韓国)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] University of Montenegro(モンテネグロ)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] SANU(セルビア)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] KAIST/IBS-CGP(韓国)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] Xi'an Jiaotong-Liverpool University(中国)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] KAIST(韓国)

    • Related Report
      2017 Research-status Report
  • [Journal Article] Equivariant cohomology of torus orbifolds2022

    • Author(s)
      Darby Alastair、Kuroki Shintaro、Song Jongbaek
    • Journal Title

      Canadian Journal of Mathematics

      Volume: 74 Issue: 2 Pages: 299-328

    • DOI

      10.4153/s0008414x20000760

    • Related Report
      2021 Annual Research Report 2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Vector bundle over a GKM graph and combinatorial Borel-Hirzebruch formula and Leray-Hirsh theorem2021

    • Author(s)
      Shintaro Kuroki
    • Journal Title

      数理解析研究所講究録

      Volume: 2199 Pages: 42-52

    • NAID

      40022811184

    • Related Report
      2021 Annual Research Report
  • [Journal Article] Flag Bott manifolds of general Lie type and their equivariant cohomology rings2020

    • Author(s)
      Kaji Shizuo、Kuroki Shintaro、Lee Eunjeong、Suh Dong Youp
    • Journal Title

      Homology, Homotopy and Applications

      Volume: 22 Issue: 1 Pages: 375-390

    • DOI

      10.4310/hha.2020.v22.n1.a21

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Gale dual of the GKM graph with a complexity one axial function2019

    • Author(s)
      Shintaro Kuroki and Ryoto Yukitou
    • Journal Title

      岡山理科大学紀要. A, 自然科学

      Volume: 55 Pages: 1-10

    • NAID

      120006778794

    • Related Report
      2019 Research-status Report
  • [Journal Article] On equivariant cohomology rings of flag Bott towers2019

    • Author(s)
      Shintaro Kuroki
    • Journal Title

      数理解析研究所講究録

      Volume: 2135 Pages: 95-107

    • NAID

      40022147360

    • Related Report
      2019 Research-status Report
  • [Journal Article] Torus orbifolds with two fixed points2019

    • Author(s)
      Alastair Darby, Shintaro Kuroki and Jongbaek Song
    • Journal Title

      Algebraic Topology and Related Topics, Trends in Mathematics

      Volume: 1 Pages: 67-85

    • DOI

      10.1007/978-981-13-5742-8_5

    • ISBN
      9789811357411, 9789811357428
    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Upper bounds for the dimension of tori acting on GKM manifolds2019

    • Author(s)
      Shintaro Kuroki
    • Journal Title

      Journal of the Mathematical Society of Japan

      Volume: 71-2 Pages: 483-513

    • NAID

      130007636387

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Quasitoric manifolds, root systems and J-constructions of polytopes2018

    • Author(s)
      Shintaro Kuroki
    • Journal Title

      RIMS Kokyuroku

      Volume: 2060 Pages: 77-81

    • Related Report
      2017 Research-status Report
    • Open Access
  • [Presentation] Equivariant vector bundles from a GKM theoretical point of view2021

    • Author(s)
      Shintaro Kuroki
    • Organizer
      RIMS meeting 2021, New developments of transformation groups
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] Equivariant vector bundle over a GKM graph and its projectivization2021

    • Author(s)
      Shintaro Kuroki
    • Organizer
      kpa70+ Transformation group theory --The path we have walked along, and the way to progress-- On the celebration for the retirement and the 70th birthday of Professor Krzystof M. Pawalowski
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Gale dual of GKM graph2020

    • Author(s)
      Shintaro Kuroki
    • Organizer
      Workshop on Torus Actions in Topology
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Gale dual of a GKM graph and its application to the extension problem of torus actions2020

    • Author(s)
      Shintaro Kuroki
    • Organizer
      International conference Topology and geometry of group actions
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] On equivariant cohomology rings of flag Bott towers2019

    • Author(s)
      黒木慎太郎
    • Organizer
      変換群論とその応用
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] Flag Bott manifolds of general Lie type and their equivariant cohomology rings2019

    • Author(s)
      Shintaro Kuroki
    • Organizer
      Topology, Geometry, and Dynamics: Rokhlin - 100
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Gale dual of a GKM graph and its basic property2019

    • Author(s)
      Shintaro Kuroki
    • Organizer
      Japanese-Russian Seminar on Toric Topology and Homotopy Theory
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Gale dual of the GKM graph and its applications to the extension of the torus action on a GKM manifold2019

    • Author(s)
      Shintaro Kuroki
    • Organizer
      The 46th Symposium on Transformation Groups
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] ヒルベルト第三問題について2019

    • Author(s)
      黒木慎太郎
    • Organizer
      Workshop on Geometric Discrete Mathematical Science III
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] Equivariant cohomology of torus orbifolds with vanishing odd degree cohomology2018

    • Author(s)
      Shintaro Kuroki
    • Organizer
      Glances at Manifolds 2018
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Equivariant cohomology of torus orbifolds2018

    • Author(s)
      Shintaro Kuroki
    • Organizer
      第45回変換群論シンポジウム
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Equivariant cohomology of torus orbifolds2017

    • Author(s)
      黒木慎太郎
    • Organizer
      代数トポロジーセミナー(京都大学)
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] Quasitoric manifolds, root systems and J-constructions of polytopes2017

    • Author(s)
      黒木慎太郎
    • Organizer
      RIMS共同研究(公開型)変換群を核とする代数的位相幾何学
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] Extended actions of quasitoric manifolds and J-constructions of polytopes2017

    • Author(s)
      Shintaro Kuroki
    • Organizer
      The Princeton-Rider Workshop on the Homotopy Theory of Polyhedral Products
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] On flagged Bott manifolds2017

    • Author(s)
      Shintaro Kuroki
    • Organizer
      Young Researchers in Homotopy Theory and Toric Topology
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] GKM manifold and GKM graph (1), (2)2017

    • Author(s)
      黒木慎太郎
    • Organizer
      空間の代数的・幾何的モデルとその周辺
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] Flag Bott manifolds and the toric closure of generic orbit associated to a generalized Bott manifold2017

    • Author(s)
      黒木慎太郎
    • Organizer
      第44回変換群論シンポジウム
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] Equivariant cohomology of a certain class of torus orbifolds2017

    • Author(s)
      Shintaro Kuroki
    • Organizer
      7th East Asian Conference on Algebraic Topology (EACAT7)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Complexity one GKM manifolds with extended actions2017

    • Author(s)
      Shintaro Kuroki
    • Organizer
      Toric Topology 2017 in Osaka
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Remarks] Shintaro KUROKI's HOME PAGE

    • URL

      https://www.xmath.ous.ac.jp/~kuroki/

    • Related Report
      2021 Annual Research Report 2018 Research-status Report 2017 Research-status Report
  • [Remarks] Toric Topology 2021 in Osaka

    • URL

      https://www.xmath.ous.ac.jp/~kuroki/Toric2021.html

    • Related Report
      2020 Research-status Report
  • [Remarks] kpa70+ Transformation group theory

    • URL

      https://www.rs.tus.ac.jp/math2/math2/tsatoh/tsatoh-homepage/kpa70+_2_2021.html

    • Related Report
      2020 Research-status Report
  • [Remarks] Shintaro KUROKI's HOME PAGE

    • URL

      https://www.xmath.ous.ac.jp/~kuroki/index.html

    • Related Report
      2020 Research-status Report
  • [Remarks] Toric Topology 2019 in Okayama

    • URL

      https://sites.google.com/view/torictopology2019okayama/enhome?authuser=0

    • Related Report
      2019 Research-status Report
  • [Remarks] Workshop for Young Researchers

    • URL

      https://sites.google.com/view/torictopology2019okayama/enhome/workshop-for-young-researchers-english?authuser=0

    • Related Report
      2019 Research-status Report
  • [Funded Workshop] Toric Topology 2022 in Osaka2022

    • Related Report
      2021 Annual Research Report
  • [Funded Workshop] Toric Topology 2021 in Osaka2021

    • Related Report
      2020 Research-status Report
  • [Funded Workshop] kpa70+ Transformation group theory --The path we have walked along, and the way to progress-- On the celebration for the retirement and the 70th birthday of Professor Krzystof M. Pawalowski2021

    • Related Report
      2020 Research-status Report
  • [Funded Workshop] Toric Topology 2019 in Okayama2019

    • Related Report
      2019 Research-status Report
  • [Funded Workshop] Workshop for Young Researchers2019

    • Related Report
      2019 Research-status Report

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Published: 2017-04-28   Modified: 2023-03-16  

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