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Construction of harmonic maps into non-compact symmetric spaces via loop groups and applications to surface theory

Research Project

Project/Area Number 15K04834
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Geometry
Research InstitutionUniversity of Tsukuba

Principal Investigator

Inoguchi Jun-ichi  筑波大学, 数理物質系, 教授 (40309886)

Project Period (FY) 2015-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywordsループ群 / 調和写像 / 対称空間 / 極小曲面 / 双曲空間 / ハイゼンベルグ群 / 反ド・ジッター空間 / 佐々木多様体 / 対称性 / 反ド・ジッター時空 / 磁場曲線 / 対数型美的曲線 / 非コンパクト対称空間 / 弾性曲線 / グラスマン幾何 / テータ関数 / 水平的曲面 / 接触構造 / ベルンシュタイン問題 / ガウス曲率
Outline of Final Research Achievements

We gave a loop group method for constructing minimal surfaces with symmetry in the 3-dimensional Heisenberg group (the model space Nil of nilgeometry in the sense of Thurston). We also established loop group methods for constructing constant negative Gaussian curvature surfaces in the hyperbolic 3-space and maximal surfaces in the 3-dimensional anti de Sitter space-time. In addition, we generalized the Uhlenbeck-Segal theory for harmonic maps into compact semi-simple Lie groups (principal chiral models) to affine harmonic maps into general Lie groups equipped with natural bi-invariant torsion free connection.

Academic Significance and Societal Importance of the Research Achievements

3次元空間の2次元図形(曲面)を深く精緻に理解するためには、それらの図形を具体的に構成することがもっとも有効である。一般にはこれらの図形を記述する方程式(非線型偏微分方程式)の解析は困難であるが, 幾何学的によい性質をもつ曲面(ガウス曲率一定曲面, 極小曲面)や理論物理学に由来する曲面(反ド・ジッター時空の極大曲面)は具体的構成法を与えることが可能であることを示した。これらの曲面に対する研究手法を与えた点が本研究の学術的意義である。本研究成果を得る過程で得られた研究手法は他の問題(磁場軌道,重調和写像)や工業意匠設計(美的曲線)にも応用できた点にも価値がある。

Report

(5 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • 2015 Research-status Report
  • Research Products

    (61 results)

All 2019 2018 2017 2016 2015 Other

All Int'l Joint Research (15 results) Journal Article (26 results) (of which Int'l Joint Research: 18 results,  Peer Reviewed: 25 results,  Open Access: 12 results,  Acknowledgement Compliant: 10 results) Presentation (17 results) (of which Int'l Joint Research: 4 results,  Invited: 11 results) Book (3 results)

  • [Int'l Joint Research] Keimyung University(韓国)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] ザグレブ大学(クロアチア)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] ヤシ大学(ルーマニア)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] ミュンヘン工科大学(ドイツ)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] ヤシ大学(ルーマニア)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] ザグレブ大学(クロアチア)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] マレーシア クアラトレンガヌ大学(マレーシア)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] ニューサウスウェールズ大学(オーストラリア)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] ミュンヘン工科大学(ドイツ)

    • Related Report
      2016 Research-status Report
  • [Int'l Joint Research] ヤシ大学(ルーマニア)

    • Related Report
      2016 Research-status Report
  • [Int'l Joint Research] ミュンヘン工科大学(ドイツ)

    • Related Report
      2015 Research-status Report
  • [Int'l Joint Research] ヤシ大学(ルーマニア)

    • Related Report
      2015 Research-status Report
  • [Int'l Joint Research] 全南大学(韓国)

    • Related Report
      2015 Research-status Report
  • [Int'l Joint Research] 南ミシシッピ大学(米国)

    • Related Report
      2015 Research-status Report
  • [Int'l Joint Research] リオデジャネイロ連邦大学(ブラジル)

    • Related Report
      2015 Research-status Report
  • [Journal Article] Generalization of log-aesthetic curves via similarity geometry2019

    • Author(s)
      Jun-ichi Inoguchi Rushan Ziatdinov Kenjiro T. Miura
    • Journal Title

      Japan Journal of Industrial and Applied Mathematics

      Volume: 36 Issue: 1 Pages: 239-259

    • DOI

      10.1007/s13160-018-0335-7

    • NAID

      210000160066

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Magnetic curves in quasi-Sasakian 3-manifolds2019

    • Author(s)
      Inoguchi Jun-ichi, Munteanu Marian Ioan, Nistor Ana Irina
    • Journal Title

      Analysis and Mathematical Physics

      Volume: 9 Issue: 1 Pages: 43-61

    • DOI

      10.1007/s13324-017-0180-x

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Magnetic curves in tangent sphere bundles II2018

    • Author(s)
      Jun-ichi Inoguchi, Marian Ioan Munteanu
    • Journal Title

      Journal of Mathematical Analysis and Applications

      Volume: 466 Issue: 2 Pages: 1570-1581

    • DOI

      10.1016/j.jmaa.2018.06.069

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Affine spheres and finite gap solutions of Tzitzeica equation2018

    • Author(s)
      Jun-ichi Inoguchi Seiichi Udagawa
    • Journal Title

      Journal of Physics Communications

      Volume: 2 Issue: 11 Pages: 115020-115020

    • DOI

      10.1088/2399-6528/aaeaa0

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Magnetic vector fields: new examples2018

    • Author(s)
      Jun-ichi Inoguchi, Marian Ioan Munteanu
    • Journal Title

      Institut Mathematique. Publications. Nouvelle Serie 117)(Beograd) (N.~S)

      Volume: 103(117) Issue: 117 Pages: 91-102

    • DOI

      10.2298/pim1817091i

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] The hidden symmetry of chiral fields and the Riemann-Hilbert problem, revisited2018

    • Author(s)
      井ノ口順一
    • Journal Title

      京都大学数理解析研究所講究録

      Volume: 2071 Pages: 1-16

    • Related Report
      2018 Annual Research Report
    • Open Access
  • [Journal Article] Killing magnetic curves in Sol32018

    • Author(s)
      Erjavec Zlatko, Inoguchi Jun-ichi
    • Journal Title

      Mathematical Physics, Analysis and Geometry

      Volume: 2018 Issue: 2

    • DOI

      10.1007/s11040-018-9272-6

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Log-aesthetic curves as similarity geometric analogue of Euler's elasticae2018

    • Author(s)
      Inoguchi Jun-ichi、Kajiwara Kenji、Miura Kenjiro T.、Sato Masayuki、Schief Wolfgang K.、Shimizu Yasuhiro
    • Journal Title

      Computer Aided Geometric Design

      Volume: 61 Pages: 1-5

    • DOI

      10.1016/j.cagd.2018.02.002

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Magnetic curves in Sol32018

    • Author(s)
      Erjavec Zlatko、Inoguchi Jun-ichi
    • Journal Title

      Journal of Nonlinear Mathematical Physics

      Volume: 25 Issue: 2 Pages: 198-210

    • DOI

      10.1080/14029251.2018.1452670

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] PERIODIC MAGNETIC CURVES IN BERGER SPHERES2017

    • Author(s)
      Inoguchi Jun-ichi、Munteanu Marian Ioan
    • Journal Title

      Tohoku Mathematical Journal, Second Series

      Volume: 69 Issue: 1 Pages: 113-128

    • DOI

      10.2748/tmj/1493172131

    • ISSN
      0040-8735, 2186-585X
    • Year and Date
      2017-03-30
    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Contact 3-manifolds with Reeb flow invariant characteristic Jacobi operator2017

    • Author(s)
      Cho Jong Taek、Inoguchi Jun-ichi
    • Journal Title

      Analele stiintifice ale Universitatii “Al. I. Cuza” din Iasi. Matematics (SERIE NOUA)

      Volume: 63 Pages: 665-676

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Fairness metric of plane curves defined with similarity geometry invariants2017

    • Author(s)
      Miura Kenjiro T.、Suzuki Sho、Gobithaasan R.U.、Usuki Shin、Inoguchi Jun-ichi、Sato Masayuki、Kajiwara Kenji、Shimizu Yasuhiro
    • Journal Title

      Computer-Aided Design and Applications

      Volume: 15 Issue: 2 Pages: 256-263

    • DOI

      10.1080/16864360.2017.1375677

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Biharmonic hypersurfaces in Riemannian symmetric spaces II2017

    • Author(s)
      Inoguchi Jun-ichi、Sasahara Toru
    • Journal Title

      Hiroshima Mathematical Journal

      Volume: 47 Pages: 349-378

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Slant curves in 3-dimensional almost f-Kenmotsu manifolds2017

    • Author(s)
      Inoguchi Jun-ichi、 Lee Ji-Eun
    • Journal Title

      Communications of the Korean Mathematical Society

      Volume: 32 Issue: 2 Pages: 417-424

    • DOI

      10.4134/ckms.c160079

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A note on almost contact Riemannian 3-manifolds II2017

    • Author(s)
      Jun-ichi Inoguchi
    • Journal Title

      Bulletin of the Korean Mathematical Society

      Volume: 54 Issue: 1 Pages: 85-97

    • DOI

      10.4134/bkms.b150772

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] A loop group method for affine harmonic maps into Lie groups2016

    • Author(s)
      Josef F. Dorfmeister, Jun-ichi Inoguchi, Shimpei Kobayashi
    • Journal Title

      Advances in Mathematics

      Volume: 298 Pages: 207-253

    • DOI

      10.1016/j.aim.2016.04.018

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Finite gap solutions for horizontal minimal surfaces of finite type in 5-sphere2016

    • Author(s)
      Jun-ichi Inoguchi, Tetsuya Taniguchi, Seiichi Udagawa
    • Journal Title

      Journal of Integrable Systems

      Volume: 2015/2016

    • DOI

      10.1093/integr/xyw011

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] dNLS Flow on Discrete Space Curves2016

    • Author(s)
      Sampei Hirose, Jun-ichi Inoguchi, Kenji Kajiwara,Nozomu Matsuura, Yasuhiro Ohta
    • Journal Title

      Mathematics for Industry

      Volume: 24 Pages: 137-150

    • DOI

      10.1007/978-981-10-1076-7_14

    • ISBN
      9789811010750, 9789811010767
    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Attractive Plane Curves in Differential Geometry2016

    • Author(s)
      Jun-ichi Inoguchi
    • Journal Title

      Mathematics for Industry

      Volume: 24 Pages: 121-136

    • DOI

      10.1007/978-981-10-1076-7_13

    • ISBN
      9789811010750, 9789811010767
    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] New examples of magnetic maps involving tangent bundles2016

    • Author(s)
      Jun-ichi Inoguchi, Marian Ioan Munteanu
    • Journal Title

      Rendiconti Sem Matematico Universita e Politecnico di Torino

      Volume: 73/1-2 Pages: 101-116

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Biharmonic hypersurfaces in Riemannian symmetric spaces I2016

    • Author(s)
      Jun-ichi Inoguchi, Toru Sasahara
    • Journal Title

      Hiroshima Mathematical Journal

      Volume: 46 Pages: 97-121

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Flat Lorentz surfaces in anti-de Sitter 3-space and gravitational instantons2016

    • Author(s)
      Jun-ichi Inoguchi, Marianty Ionel, Sungwook Lee
    • Journal Title

      International Journal of Geometric Methods in Modern Physics

      Volume: 13 Issue: 02 Pages: 1650012-1650012

    • DOI

      10.1142/s0219887816500122

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] On the Bernstein Problem in the Three-dimensional Heisenberg Group2016

    • Author(s)
      Josef F. Dorfmeister, Jun-ichi Inoguchi, Shimpei Kobayashi
    • Journal Title

      Canadian Mathematical Bulletin

      Volume: 59 Issue: 01 Pages: 50-61

    • DOI

      10.4153/cmb-2015-061-3

    • NAID

      120005756104

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Magnetic curves in Sasakian manifolds2015

    • Author(s)
      Simona Luiza Druta-Romaniuc, Jun-ichi Inoguchi, Marian Ioan Munteanu, Ana Irina Nistor
    • Journal Title

      Journal of Nonlinear Mathematical Physics

      Volume: 22 Issue: 3 Pages: 428-447

    • DOI

      10.1080/14029251.2015.1079426

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Characteristic Jacobi operator on contact Riemannian 3-manifolds2015

    • Author(s)
      Jong Taek Cho, Jun-ichi Inoguchi
    • Journal Title

      Differential Geometry Dynamical Systems

      Volume: 17 Pages: 49-71

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Slant curves in 3-dimensional almost contact metric geometry2015

    • Author(s)
      Jun-ichi Inoguchi, Ji-Eun Lee
    • Journal Title

      International Electronic Journal of Geometry

      Volume: 8 Pages: 106-146

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Harmonic map into Lie groups, revisited2018

    • Author(s)
      Inoguchi, Jun-ichi
    • Organizer
      The Joint International Meeting of the Chinese mathematical Society and American Mathematical Society
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Curve flows, integrable systems and industrial design2018

    • Author(s)
      Inoguchi, Jun-ichi
    • Organizer
      Integrable Geometry at Bayrischzell
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 対数型美的曲線の相似幾何学的定式化2018

    • Author(s)
      井ノ口順一
    • Organizer
      精密工学会、AIMaP数学応用シンポジウム:精密工学と幾何学の新たな出会い
    • Related Report
      2017 Research-status Report
  • [Presentation] 対数型美的曲線の相似幾何における平面曲線に対する変分原理による 定式化2017

    • Author(s)
      井ノ口 順一、梶原 健司、三浦 憲二郎、Schief Wolfgang
    • Organizer
      日本応用数理学会2017年度年会
    • Related Report
      2017 Research-status Report
  • [Presentation] 相似幾何不変量による平面曲線のFairness 測度2017

    • Author(s)
      三浦憲二郎、鈴木晶、臼杵深, Gobithaasan Rudrusamy、 井ノ口順一、佐藤雅之、梶原健司、清水保弘
    • Organizer
      日本応用数理学会2017年度年会
    • Related Report
      2017 Research-status Report
  • [Presentation] Grassmann geometry of surfaces in 3-dimensional homogeneous spaces2017

    • Author(s)
      Jun-ichi Inoguchi
    • Organizer
      International Conference on Applied and Pure Mathematics (ICAPM 2017)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 相似幾何における弾性曲線とその離散化. CAGD との関連について2017

    • Author(s)
      井ノ口順一、梶原健司、三浦憲二郎、朴 炯基、Schief Wolfgang
    • Organizer
      九州大学応用力学研究所 共同利用研究集会 非線形波動研究の新潮流. 理論とその応用
    • Related Report
      2017 Research-status Report
  • [Presentation] Grasmann geometry of 3-dimensional homogeneous spaces2016

    • Author(s)
      井ノ口順一
    • Organizer
      内藤博夫先生退職記念研究集会
    • Place of Presentation
      山口大学(山口県山口市)
    • Year and Date
      2016-03-06
    • Related Report
      2015 Research-status Report
    • Invited
  • [Presentation] Chiral fields and Riemann-Hilbert problems, revisited2016

    • Author(s)
      井ノ口順一
    • Organizer
      応用解析研究会. 可積分系から計算数学まで
    • Place of Presentation
      天満研修センター(大阪府・大阪市)
    • Related Report
      2016 Research-status Report
    • Invited
  • [Presentation] 平面曲線と意匠設計2016

    • Author(s)
      井ノ口順一
    • Organizer
      第63回幾何学シンポジウム
    • Place of Presentation
      岡山大学(岡山県・岡山市)
    • Related Report
      2016 Research-status Report
    • Invited
  • [Presentation] 磁場軌道と接触構造2016

    • Author(s)
      井ノ口順一
    • Organizer
      部分多様体とリー群作用 2016
    • Place of Presentation
      東京理科大学森戸記念館(東京都・新宿区)
    • Related Report
      2016 Research-status Report
    • Invited
  • [Presentation] The hidden symmetry of chiral fields and the Riemann-Hilbert problem, revisited2016

    • Author(s)
      井ノ口順一
    • Organizer
      RIMS 研究集会「可積分系数理の現状と展望」
    • Place of Presentation
      京都大学北部総合研究科棟・益川ホール(京都府・京都市)
    • Related Report
      2016 Research-status Report
    • Invited
  • [Presentation] 相似幾何学と等積幾何学における平面曲線2016

    • Author(s)
      井ノ口順一
    • Organizer
      九州大学 IMI 短期共同研究 「意匠設計のための微分幾何学・離散微分幾何」
    • Place of Presentation
      九州大学 IMI研究所(福岡県福岡市)
    • Related Report
      2016 Research-status Report
  • [Presentation] 19世紀の微分幾何2016

    • Author(s)
      井ノ口順一
    • Organizer
      第27回数学史シンポジウム
    • Place of Presentation
      津田塾大学(東京都小平市)
    • Related Report
      2016 Research-status Report
  • [Presentation] 魅力的な曲線たち2015

    • Author(s)
      井ノ口順一
    • Organizer
      日本数学会北海道支部講演会
    • Place of Presentation
      北海道大学(北海道札幌市)
    • Year and Date
      2015-12-03
    • Related Report
      2015 Research-status Report
    • Invited
  • [Presentation] Biharmonic hypersurfaces in symmetric spaces2015

    • Author(s)
      Jun-ichi Inoguchi
    • Organizer
      Workshop Differential Geometry with Dajczer
    • Place of Presentation
      東京工業大学(東京都目黒区)
    • Year and Date
      2015-10-07
    • Related Report
      2015 Research-status Report
    • Invited
  • [Presentation] Attractive plane curves in differential geometry2015

    • Author(s)
      Jun-ichi Inoguchi
    • Organizer
      Mathematical Progress in Expressive Image Synthesis 2015
    • Place of Presentation
      九州大学西新プラザ(福岡県福岡市)
    • Year and Date
      2015-09-27
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research / Invited
  • [Book] 解析学百科II 可積分系の数理2018

    • Author(s)
      中村佳正、高崎金久、辻本諭、尾角正人、井ノ口順一
    • Total Pages
      448
    • Publisher
      朝倉書店
    • ISBN
      9784254117271
    • Related Report
      2017 Research-status Report
  • [Book] はじめて学ぶリー群2017

    • Author(s)
      井ノ口順一
    • Total Pages
      259
    • Publisher
      現代数学社
    • ISBN
      9784768704707
    • Related Report
      2017 Research-status Report
  • [Book] 曲面と可積分系2016

    • Author(s)
      井ノ口順一
    • Total Pages
      224
    • Publisher
      朝倉書店
    • Related Report
      2015 Research-status Report

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Published: 2015-04-16   Modified: 2022-02-07  

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