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Geometric structures and combinaorial structures of 3-manifolds

Research Project

Project/Area Number 15H03620
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Geometry
Research InstitutionHiroshima University

Principal Investigator

Sakuma Makoto  広島大学, 理学研究科, 教授 (30178602)

Co-Investigator(Kenkyū-buntansha) 島田 伊知朗  広島大学, 理学研究科, 教授 (10235616)
古宇田 悠哉  広島大学, 理学研究科, 准教授 (20525167)
土井 英雄  広島大学, 理学研究科, 准教授 (50197993)
秋吉 宏尚  大阪市立大学, 大学院理学研究科, 准教授 (80397611)
茂手木 公彦  日本大学, 文理学部, 教授 (40219978)
谷山 公規  早稲田大学, 教育・総合科学学術院, 教授 (10247207)
大山 淑之  東京女子大学, 現代教養学部, 教授 (80223981)
石川 昌治  東北大学, 理学研究科, 准教授 (10361784)
新國 亮  東京女子大学, 現代教養学部, 准教授 (00401878)
三松 佳彦  中央大学, 理工学部, 教授 (70190725)
Project Period (FY) 2015-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥16,510,000 (Direct Cost: ¥12,700,000、Indirect Cost: ¥3,810,000)
Fiscal Year 2019: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2018: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2017: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2016: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2015: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Keywords2橋結び目 / クライン群 / 双曲構造 / ヘガード分解 / 写像類群 / 双曲結び目 / 放物変換 / 測地線 / Heckoid群 / 放物的変換 / monodromy group / spatial deformation group / 穴あきトーラス / 離散群 / デーン手術 / CAT(0)空間 / シンメトリー群 / 自由周期 / アキラル / 解消トンネル / 自由周期結び目 / Hopfian群 / 交代結び目 / 強可逆結び目 / ザイフェルト曲面 / 橋分解 / モノドロミー群 / 2橋絡み目 / 放物的生成系 / 交代絡み目 / 3次元多様体 / 結び目理論 / Riley slice
Outline of Final Research Achievements

The main purpose of this research project is to extend and deepen the results which the PI had obtained through a series of joint works with Hirotaka Akiyoshi, Masaaki Wada and Yasushi Yamashita and through a successive series of joint works with Donghi Lee. The main results obtained by this research project are the following. For a punctured hyperbolic surface, the action of the mapping class group on the space of the geodesic rays emanating from the puncture is almost everywhere wandering (joint work with Brian Bowditch). Proof of the homotopical nontriviality of the edges of Yokota-Thurston decompositions of hyperbolic alternating links (joint work with Yoshiyuki Yokota). Classification of non-free Kleinian groups generated by two parabolic transformations (joint work with Hirotaka Akiyoshi, Ken’ichi Ohshika, John Parker and Han Yoshida), and classification of parabolic generating pairs of such groups (joint work with Shunsuke Aimi, Donghi Lee and Shunsuke Sakai).

Academic Significance and Societal Importance of the Research Achievements

2橋絡み目は非常に特殊であるが極めて重要な研究対象である。研究代表者は秋吉宏尚,和田昌昭,山下靖との一連の共同研究,及びそれに続く Donghi Lee との一連の共同研究により,2橋絡み目の幾何構造に関する研究成果を積み上げてきた。2橋結び目に関するこれらの研究成果がどこまで一般的状況で成り立つかという問題は,極めて自然な問題である。科研費の援助を得て,この方向で,自分なりに納得できる研究成果を達成できたことを深く感謝している。この自然な問題に対して一定の研究成果を収めた本研究は,客観的に見ても学術的意味と社会的意義を持つと考える。

Report

(6 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • 2015 Annual Research Report
  • Research Products

    (40 results)

All 2020 2019 2018 2017 2016 2015 2012 Other

All Int'l Joint Research (4 results) Journal Article (13 results) (of which Int'l Joint Research: 6 results,  Peer Reviewed: 11 results,  Acknowledgement Compliant: 3 results,  Open Access: 1 results) Presentation (19 results) (of which Int'l Joint Research: 12 results,  Invited: 18 results) Funded Workshop (4 results)

  • [Int'l Joint Research] Durham University(英国)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] 釜山大学(韓国)

    • Related Report
      2016 Annual Research Report
  • [Int'l Joint Research] Warwick大学(英国)

    • Related Report
      2016 Annual Research Report
  • [Int'l Joint Research] Pusan National University(韓国)

    • Related Report
      2015 Annual Research Report
  • [Journal Article] Twisted book decompositions and the Goeritz groups2020

    • Author(s)
      Daiki Iguchi, Yuya Koda
    • Journal Title

      Topology and its Applications

      Volume: 272 Pages: 107064-107064

    • DOI

      10.1016/j.topol.2020.107064

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Prime amphicheiral knots with free period 22019

    • Author(s)
      Paoluzzi Luisa、Sakuma Makoto
    • Journal Title

      Proceedings of the Edinburgh Mathematical Society

      Volume: 63 Issue: 1 Pages: 105-138

    • DOI

      10.1017/s0013091519000257

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Thin representations for the one-cone torus group2019

    • Author(s)
      Hirotaka Akiyoshi
    • Journal Title

      Topology and its Applications

      Volume: 264 Pages: 115-144

    • DOI

      10.1016/j.topol.2019.06.025

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] An application of non-positively curved cubings of alternating links2018

    • Author(s)
      Sakuma Makoto、Yokota Yoshiyuki
    • Journal Title

      Proceedings of the American Mathematical Society

      Volume: 146 Issue: 7 Pages: 3167-3178

    • DOI

      10.1090/proc/13918

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The action of the mapping class group on the space of geodesic rays of a punctured hyperbolic surface2018

    • Author(s)
      Bowditch Brian、Sakuma Makoto
    • Journal Title

      Groups, Geometry, and Dynamics

      Volume: 12 Issue: 2 Pages: 703-719

    • DOI

      10.4171/ggd/453

    • Related Report
      2018 Annual Research Report
  • [Journal Article] The action of the mapping class group on the space of geodesic rays of a punctured hyperbolic surface2018

    • Author(s)
      Brian Bowditch and Makoto Sakuma
    • Journal Title

      Groups Geometry and Dynamics

      Volume: 印刷中

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] An application of non-positively curved cubings of alternating links2018

    • Author(s)
      Makoto Sakuma and Yoshiyuki Yokota
    • Journal Title

      Proceedings of American Mathematical Society

      Volume: 印刷中

    • Related Report
      2017 Annual Research Report
  • [Journal Article] A family of two-generator non-Hopfian groups2017

    • Author(s)
      Donghi Lee and Makoto Sakuma
    • Journal Title

      Internat. J. Algebra Comput.

      Volume: 27 Issue: 06 Pages: 655-675

    • DOI

      10.1142/s0218196717500321

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Parabolic generating pairs of genus-one 2-bridge knot groups2016

    • Author(s)
      Donghi Lee and Makoto Sakuma
    • Journal Title

      J. Knot Theory Ramifications

      Volume: 25 Issue: 05 Pages: 1650023-1650023

    • DOI

      10.1142/s0218216516500231

    • Related Report
      2016 Annual Research Report 2015 Annual Research Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Homotopically equivalent simple loops on 2-bridge spheres in Heckoid orbifolds for 2-bridge links (I)2016

    • Author(s)
      Donghi Lee and Makoto Sakuma
    • Journal Title

      J. Knot Theory Ramifications

      Volume: 25 Issue: 11 Pages: 1650067-1650067

    • DOI

      10.1142/s021821651650067x

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Homotopically equivalent simple loops on 2-bridge spheres in Heckoid orbifolds for 2-bridge links (II)2016

    • Author(s)
      Donghi Lee and Makoto Sakuma
    • Journal Title

      J. Knot Theory Ramifications

      Volume: 25 Issue: 11 Pages: 1650066-1650066

    • DOI

      10.1142/s0218216516500668

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Subgroups of mapping class groups related to Heegaard splittings and bridge decompositions2016

    • Author(s)
      Ken'ichi Ohshika, Makoto Sakuma
    • Journal Title

      Geometriae Dedicata

      Volume: 180 Issue: 1 Pages: 117-134

    • DOI

      10.1007/s10711-015-0094-4

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Simple loops on 2-bridge spheres in Heckoid orbifolds for 2-bridge link complements2012

    • Author(s)
      Donghi Lee, Makoto Sakuma
    • Journal Title

      Electron. Res. Announc. Math. Sci.

      Volume: 19 Issue: 0 Pages: 97-111

    • DOI

      10.3934/era.2012.19.97

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed
  • [Presentation] Kleinian groups generated by two parabolic transformations2020

    • Author(s)
      Makoto Sakuma
    • Organizer
      Low-dimensional topology, Oberwolfach
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Kleinian groups generated by two parabolic transformations2019

    • Author(s)
      Makoto Sakuma
    • Organizer
      Topology and geometry of low-dimensional manifolds
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Kleinian groups generated by two parabolic transformations2018

    • Author(s)
      Makoto Sakuma
    • Organizer
      Geometry and Topology of 3-manifolds workshop
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Kleinian groups generated by two parabolic transformations2018

    • Author(s)
      Makoto Sakuma
    • Organizer
      Representation varieties and geometric structures in low dimensions
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] A conjectural picture of Kleinian groups generated by two parabolic transformations2018

    • Author(s)
      Makoto Sakuma
    • Organizer
      Classical and Quantum 3-Manifold Topology
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Fiber surfaces and Heegaard surfaces of 3-manifolds I, II2018

    • Author(s)
      Makoto Sakuma
    • Organizer
      Geometry of Moduli Space of Low Dimensional Manifolds
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] End Invariants of SL(2,C) characters of the once-punctured torus2018

    • Author(s)
      Makoto Sakuma
    • Organizer
      Low dimensional topology and number theory X
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Agol's classification of Kleinian groups generated by two parabolic transformations2017

    • Author(s)
      Makoto Sakuma
    • Organizer
      Growth 4
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 3次元多様体のファイバー曲面とヘガード曲面2017

    • Author(s)
      作間 誠
    • Organizer
      2017年度日本数学会周期総合分科会
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] Kleinian grpups generated by two parabolic transformations2016

    • Author(s)
      Makoto Sakuma
    • Organizer
      Fundamental Groups, Representations and Geometric Structures in 3-manifold Topology
    • Place of Presentation
      広島大学
    • Year and Date
      2016-11-22
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 結び目と3次元多様体 ~幾何構造とファイバー構造を中心として~2016

    • Author(s)
      作間誠
    • Organizer
      第63回トポロジーシンポジウム
    • Place of Presentation
      神戸大学
    • Year and Date
      2016-07-05
    • Related Report
      2016 Annual Research Report
    • Invited
  • [Presentation] Parabolic generating pairs of 2-bridge links and Heckoid groups2016

    • Author(s)
      作間 誠
    • Organizer
      「リーマン面,不連続群」研究集会
    • Place of Presentation
      東京工業大学
    • Year and Date
      2016-02-13
    • Related Report
      2015 Annual Research Report
    • Invited
  • [Presentation] Parabolic generating pairs of 2-bridge links and Heckoid groups2016

    • Author(s)
      Makoto Sakuma
    • Organizer
      Workshop on Teichmuller theory and low dimensional topology
    • Place of Presentation
      三亜(中国)
    • Year and Date
      2016-01-11
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] The action of the mapping class group on the space of geodesic rays of a punctured hyperbolic surface2016

    • Author(s)
      作間誠
    • Organizer
      早稲田双曲幾何幾何学的群論セミナー
    • Place of Presentation
      早稲田大学
    • Related Report
      2016 Annual Research Report
    • Invited
  • [Presentation] 2橋絡み目群のメリディアン生成系2015

    • Author(s)
      作間 誠
    • Organizer
      N-KOOKセミナー
    • Place of Presentation
      大阪市立大学文化交流センター
    • Year and Date
      2015-12-09
    • Related Report
      2015 Annual Research Report
    • Invited
  • [Presentation] Parabolic generating pairs of genus-one 2-bridge knot groups2015

    • Author(s)
      Makoto Sakuma
    • Organizer
      Topology and geometry of low dimensional manifolds
    • Place of Presentation
      奈良女子大学
    • Year and Date
      2015-10-27
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] The space of two-parabolic-generator Kleinian groups2015

    • Author(s)
      作間 誠
    • Organizer
      拡大KOOKセミナー
    • Place of Presentation
      神戸大学
    • Year and Date
      2015-08-18
    • Related Report
      2015 Annual Research Report
  • [Presentation] Mapping class group action on the space of geodesic rays of a punctured hyperbolic surface2015

    • Author(s)
      Makoto Sakuma
    • Organizer
      Invariants in low-dimensional geometry
    • Place of Presentation
      アンカラ(トルコ)
    • Year and Date
      2015-08-10
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] The Cannon-Thurston maps and the canonical decompositions of punctured surface bundles over the circle2015

    • Author(s)
      作間 誠
    • Organizer
      東京大学火曜トポロジーセミナー
    • Place of Presentation
      東京大学
    • Year and Date
      2015-06-30
    • Related Report
      2015 Annual Research Report
    • Invited
  • [Funded Workshop] Branched coverings, degenerations, and related topics 20192019

    • Related Report
      2018 Annual Research Report
  • [Funded Workshop] Branched coverings, degenerations, and related topics2018

    • Related Report
      2017 Annual Research Report
  • [Funded Workshop] Branched Coverings, Degenerations and Related Topics 20172017

    • Place of Presentation
      東北学院大学
    • Year and Date
      2017-03-07
    • Related Report
      2016 Annual Research Report
  • [Funded Workshop] Branched Coverings, Degenerations, and Related Topics 20162016

    • Place of Presentation
      広島大学
    • Year and Date
      2016-03-07
    • Related Report
      2015 Annual Research Report

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Published: 2015-04-16   Modified: 2022-11-04  

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