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Study of the geography for 4-dimensional topology and of surgery via mapping class groups

Research Project

Project/Area Number 16K17601
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Geometry
Research InstitutionOkayama University (2017-2020)
Osaka Electro-Communication University (2016)

Principal Investigator

Monden Naoyuki  岡山大学, 自然科学研究科, 准教授 (60611986)

Project Period (FY) 2016-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2019: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
KeywordsLefschetz fibration / 写像類群 / 線織面 / 有限表示群 / 既約性 / 曲面上の曲面束 / 安定交換子長 / 4次元シンプレクティック多様体 / 地誌学 / トポロジー / 幾何学
Outline of Final Research Achievements

In 4-dimensional topology, fiber bundle structures and fiber space structures of 4-manifold are important objects of research. We constructed some new examples of Lefschetz fibrations and surface bundles over surfaces. In addition, we gave a new upper bound for stable commutator length of a Dehn twist in the mapping class group of a surface.

Academic Significance and Societal Importance of the Research Achievements

4次元を境にトポロジーの研究は大きく変わる. 他の次元に比べて4次元多様体の全体像はわかっていない部分が多いため, 様々な例を構成することにより全体像の振る舞いを調べようという研究が活発に行われている. 本研究は新たな4次元多様体を構成したり, 4次元多様体に入るLefschetz fibrationや曲面上の曲面束の構造の新たな例を構成したことにより, 4次元多様体の全体像の解明への足掛かりになるものと思われる.

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

    (7 results)

All 2020 2019 2017 Other

All Int'l Joint Research (3 results) Journal Article (3 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 3 results) Presentation (1 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results)

  • [Int'l Joint Research] マサチューセッツ大学(米国)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] ミネソタ大学(米国)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] The University of Massachusetts Amherst(米国)

    • Related Report
      2017 Research-status Report
  • [Journal Article] Genus 2 Lefschetz fibrations with b 2 + = 1 and c 1 2 = 1 , 22020

    • Author(s)
      Akhmedov Anar、Monden Naoyuki
    • Journal Title

      Kyoto Journal of Mathematics

      Volume: 60 Issue: 4 Pages: 1419-1451

    • DOI

      10.1215/21562261-2019-0067

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Nonholomorphic Lefschetz fibrations with(-1)-sections2019

    • Author(s)
      Hamada Noriyuki、Kobayashi Ryoma、Monden Naoyuki
    • Journal Title

      Pacific Journal of Mathematics

      Volume: 298 Issue: 2 Pages: 375-398

    • DOI

      10.2140/pjm.2019.298.375

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Signatures of surface bundles and scl of a Dehn twist2019

    • Author(s)
      Monden Naoyuki
    • Journal Title

      Journal of the London Mathematical Society

      Volume: 100 Issue: 3 Pages: 957-986

    • DOI

      10.1112/jlms.12247

    • NAID

      120006862675

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] Signatures of surface bundles over surfaces2017

    • Author(s)
      Naoyuki Monden
    • Organizer
      Low Dimensional Topology and Gauge Theory
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited

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Published: 2016-04-21   Modified: 2022-02-21  

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