Kondo Kei 近藤慶

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KONDO Kei 近藤慶

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Researcher Number	70736123
Other IDs
Affiliation (Current)	2025: 岡山大学, 環境生命自然科学学域, 教授
Affiliation (based on the past Project Information) *help	2023: 岡山大学, 環境生命自然科学学域, 教授 2021 – 2022: 岡山大学, 自然科学学域, 教授 2019 – 2021: 岡山大学, 自然科学研究科, 教授 2017 – 2018: 山口大学, 大学院創成科学研究科, 准教授 2016: 山口大学, 創成科学研究科, 准教授 2014 – 2015: 山口大学, 理工学研究科, 准教授 2014: 山口大学, 大学院理工学研究科, 准教授
Review Section/Research Field	Principal Investigator Basic Section 11020:Geometry-related / Geometry Except Principal Investigator Geometry / Basic Section 11020:Geometry-related
Keywords	Principal Investigator 薄滑解析（Nonsmooth Analysis） / 折り紙 / 薄滑解析 / Allen-Cahn方程式 / 部分多様体論 / 偏微分方程式 / 川崎条件 / リーマン多様体 / 崩壊理論 / リーマン幾何 … More / 沈め込み / 薄滑解析（Nonsmooth analysis） / 微分球面定理 / 微分構造 / 球面定理 / 異種構造 / 大域リーマン幾何学 / 最小跡 / Groveと塩濱の臨界点理論 / Reebの球面定理 / 異種球面 / リプシッツ写像 / 薄滑解析(Nonsmooth Analysis) / 大域リーマン幾何 … More Except Principal Investigator Riemannian manifold / C-stationary map / symphonic map / pullback / variational problem / 共形写像 / 変分問題 / リー理論 / グラスマン幾何 / 曲面論 / 対称空間 / 共形構造 / C-staionary map / harmonic map / リーマン幾何 / 等質部分多様体 / 準線形偏微分方程式 / リーマン対称空間 / 部分多様体 / 微分幾何 / symphonic flow / metric / weakly conformal map / conformal map / 多様体 / 幾何学 / 微分幾何学 Less

Is it possible to mathematically formulate origami for materials with the property of stretching and shrinking?Principal Investigator
- Principal Investigator
  
  近藤慶
- Project Period (FY)
  2022 – 2026
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Review Section
  
  Basic Section 11020:Geometry-related
- Research Institution
  Okayama University
A variational problem on conformality of maps and a variational problem on pullbacks of metrics
- Principal Investigator
  
  Nakauchi Nobumitsu
- Project Period (FY)
  2018 – 2021
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Review Section
  
  Basic Section 11020:Geometry-related
- Research Institution
  Yamaguchi University
The application of nonsmooth analysis to the collapsing theory and exotic structurePrincipal Investigator
- Principal Investigator
  
  KONDO Kei
- Project Period (FY)
  2017 – 2021
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Okayama University
  Yamaguchi University
A construction of the thery of homogeneous surfaces in Riemannian symmetric spaces
- Principal Investigator
  
  Naitoh Hiroo
- Project Period (FY)
  2016 – 2020
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Yamaguchi University
Research on a variational problem related to conformal maps and a variational problem of pullback of metrics
- Principal Investigator
  
  Nakauchi Nobumitsu
- Project Period (FY)
  2015 – 2018
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Yamaguchi University
Grassmann geomety of surfaces in a Riemannian symmetric space
- Principal Investigator
  
  NAITOH Hiroo
- Project Period (FY)
  2011 – 2014
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Yamaguchi University

All 2023 2022 2020 2019 2018 2017 2016 2015 2014

All Journal Article Presentation

[Journal Article] Approximations of Lipschitz maps via Ehresmann fibrations and Reeb's sphere theorem for Lipschitz functions2022
- Author(s)
  KONDO Kei
- Journal Title
  
  Journal of the Mathematical Society of Japan
  
  Volume: 74 Issue: 2 Pages: 521-548
- DOI
  10.2969/jmsj/83448344
- ISSN
  0025-5645, 1881-1167, 1881-2333
- Language
  English
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-22K03288
[Journal Article] Differentiable sphere theorems whose comparison spaces are standard sphere or exotic ones2020
- Author(s)
  Kei Kondo, Minoru Tanaka
- Journal Title
  
  Kodai Mathematical Journal
  
  Volume: 43 Pages: 349-365
- NAID
  130007872701
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-16K05133
[Journal Article] Differentiable sphere theorems whose comparison spaces are standard sphere or exotic ones2020
- Author(s)
  Kei KONDO and Minoru TANAKA
- Journal Title
  
  Kodai Mathematical Journal
  
  Volume: 43 Pages: 349-365
- NAID
  130007872701
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-17K05220
[Journal Article] Approximations of Lipschitz maps via immersions2017
- Author(s)
  Kei Kondo, Minoru Tanaka
- Journal Title
  
  Nonlinear Analysis
  
  Volume: 155 Pages: 219-249
- DOI
  10.1016/j.na.2017.01.022
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-16K05133, KAKENHI-PROJECT-17K05220, KAKENHI-PROJECT-15K04846
[Journal Article] TOPOLOGY OF COMPLETE FINSLER MANIFOLDS WITH RADIAL FLAG CURVATURE BOUNDED BELOW2014
- Author(s)
  Kei Kondo, Shin-ichi Ohta, Minoru Tanaka
- Journal Title
  
  Kyushu Journal of Mathematics
  
  Volume: 68 Issue: 2 Pages: 347-357
- DOI
  10.2206/kyushujm.68.347
- NAID
  130004704709
- ISSN
  1340-6116, 1883-2032
- Language
  English
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-23540091
[Presentation] On the extension of Reeb-Milnor-Rosen's sphere theorem to Lipschitz functions, Pt.22023
- Author(s)
  近藤慶
- Organizer
  ワークショップ「Tsukuba Global Riemannian Geometry」 2023年3月7日
- Invited
- Data Source
  KAKENHI-PROJECT-22K03288
[Presentation] On the extension of Reeb-Milnor-Rosen's sphere theorem to Lipschitz functions, Pt.12023
- Author(s)
  近藤慶
- Organizer
  ワークショップ「Tsukuba Global Riemannian Geometry」 2023年3月6日
- Invited
- Data Source
  KAKENHI-PROJECT-22K03288
[Presentation] リプシッツ関数に関するレーブの球面定理2023
- Author(s)
  近藤慶
- Organizer
  研究集会「測地線及び関連する諸問題」、熊本大学黒髪南キャンパス
- Invited
- Data Source
  KAKENHI-PROJECT-22K03288
[Presentation] フィンスラー多様体上の等長変換群がリー群であることの測地線論的別証明2023
- Author(s)
  近藤慶，篠田裕佑
- Organizer
  日本数学会・2023年度年会秋季総合分科会
- Data Source
  KAKENHI-PROJECT-22K03288
[Presentation] リプシッツ関数に関するレーブの球面定理2023
- Author(s)
  近藤慶
- Organizer
  部分多様体幾何とリー群作用 2022（東京理科大学神楽坂キャンパス森戸記念館第1フォーラム）
- Invited
- Data Source
  KAKENHI-PROJECT-22K03288
[Presentation] レーブ・ミルナー・ローゼンの球面定理のリプシッツ関数への拡張について2023
- Author(s)
  近藤慶
- Organizer
  福岡大学微分幾何研究集会2023（福岡大学七隈キャンパス）
- Invited
- Data Source
  KAKENHI-PROJECT-22K03288
[Presentation] 丸い話：レーブの球面定理を巡って2022
- Author(s)
  近藤慶
- Organizer
  山口大学理学部談話会 2022年9月29日
- Invited
- Data Source
  KAKENHI-PROJECT-22K03288
[Presentation] リプシッツ関数に関するレーブの球面定理2022
- Author(s)
  近藤慶
- Organizer
  日本数学会、2022年度秋季総合分科会
- Data Source
  KAKENHI-PROJECT-22K03288
[Presentation] Huberの有限連結性定理の高次元化について2020
- Author(s)
  近藤慶、篠田祐佑
- Organizer
  日本数学会・2020年度年会秋季総合分科会、熊本大学（オンライン）
- Data Source
  KAKENHI-PROJECT-17K05220
[Presentation] リーマン幾何における薄滑解析とリプシッツ写像の近似定理2019
- Author(s)
  近藤慶
- Organizer
  合宿セミナー 2019 in 倉敷，倉敷山陽ハイツ（岡山県・倉敷市）
- Invited
- Data Source
  KAKENHI-PROJECT-16K05133
[Presentation] リーマン幾何における薄滑解析とリプシッツ写像の近似定理2019
- Author(s)
  近藤慶
- Organizer
  岡山大学理学部談話会（岡山大学，岡山県岡山市，10月21日）
- Invited
- Data Source
  KAKENHI-PROJECT-17K05220
[Presentation] リーマン幾何における薄滑解析とリプシッツ写像の近似定理2019
- Author(s)
  近藤慶
- Organizer
  岡山大学理学部談話会
- Invited
- Data Source
  KAKENHI-PROJECT-18K03280
[Presentation] リーマン幾何における薄滑解析とリプシッツ写像の近似定理2019
- Author(s)
  近藤慶
- Organizer
  合宿セミナー 2019 in 倉敷（倉敷山陽ハイツ，岡山県倉敷市，12月14日）
- Invited
- Data Source
  KAKENHI-PROJECT-17K05220
[Presentation] Hopfのピンチング予想から微分異種球面定理へ2018
- Author(s)
  近藤慶
- Organizer
  日本数学会 2018年度年会春分科会，東京大学（東京都目黒区駒場）
- Invited
- Data Source
  KAKENHI-PROJECT-17K05220
[Presentation] Hopfのピンチング予想から微分異種球面定理へ2018
- Author(s)
  近藤慶
- Organizer
  日本数学会，2018年度年会春分科会
- Data Source
  KAKENHI-PROJECT-16K05133
[Presentation] Hopfのピンチング予想から微分異種球面定理へ2018
- Author(s)
  近藤慶
- Organizer
  榎本一之教授退職直前ワークショップ，東京工業大学（東京都目黒区大岡山）
- Invited
- Data Source
  KAKENHI-PROJECT-17K05220
[Presentation] Hopfのピンチング予想から微分異種球面定理へ2018
- Author(s)
  Kei Kondo
- Organizer
  日本数学会年会
- Invited
- Data Source
  KAKENHI-PROJECT-15K04846
[Presentation] Hopfのピンチング予想から微分異種球面定理へ2017
- Author(s)
  近藤慶
- Organizer
  4次元トポロジーセミナー，大阪大学（大阪府豊中市）
- Invited
- Data Source
  KAKENHI-PROJECT-17K05220
[Presentation] 微分異種球面定理2016
- Author(s)
  近藤慶
- Organizer
  日本数学会年会
- Place of Presentation
  筑波大学（茨城県つくば市）
- Year and Date
  2016-01-10
- Data Source
  KAKENHI-PROJECT-15K04846
[Presentation] 薄滑解析と微分球面定理2016
- Author(s)
  近藤慶
- Organizer
  日本数学会秋期総合分科会
- Place of Presentation
  関西大学（大阪府吹田市）
- Invited
- Data Source
  KAKENHI-PROJECT-15K04846
[Presentation] 薄滑解析と微分球面定理（特別講演）2016
- Author(s)
  近藤慶
- Organizer
  日本数学会 2016年度秋季総合分科会
- Place of Presentation
  関西大学（大阪府吹田市）
- Invited
- Data Source
  KAKENHI-PROJECT-16K05133
[Presentation] リプシッツ写像に対するはめ込み近似定理とその応用2015
- Author(s)
  近藤慶
- Organizer
  『測地線及び関連する諸問題』研究集会
- Place of Presentation
  熊本大学教育学部 (熊本市)
- Year and Date
  2015-01-11
- Invited
- Data Source
  KAKENHI-PROJECT-23540091
[Presentation] Grove-Shiohama type sphere theorem in Finsler geometry2014
- Author(s)
  Kei Kondo
- Organizer
  The 29th Annual Conference of Ramanujan Mathematical Society 2014
- Place of Presentation
  Indian Institute of Science Educaton and Research, Pune, India
- Year and Date
  2014-06-24
- Invited
- Data Source
  KAKENHI-PROJECT-23540091

1. NAITOH Hiroo (10127772)

# of Collaborated Projects: 5 results

# of Collaborated Products: 0 results
2. NAKAUCHI Nobumitsu (50180237)

# of Collaborated Projects: 5 results

# of Collaborated Products: 0 results
3. KAJI Shizuo (00509656)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
4. KAWAKAMI Yu (60532356)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
5. 井ノ口順一 (40309886)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
6. 間下克哉 (50157187)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
7. 安井弘一 (70547009)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
8. 谷口雅治 (30260623)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
9. 物部治徳 (20635809)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results

Kondo Kei 近藤 慶

KONDO Kei 近藤 慶

Research Projects

Research Products

Co-Researchers

Is it possible to mathematically formulate origami for materials with the property of stretching and shrinking?Principal Investigator

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

A variational problem on conformality of maps and a variational problem on pullbacks of metrics

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

The application of nonsmooth analysis to the collapsing theory and exotic structurePrincipal Investigator

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

A construction of the thery of homogeneous surfaces in Riemannian symmetric spaces

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

Research on a variational problem related to conformal maps and a variational problem of pullback of metrics

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

Grassmann geomety of surfaces in a Riemannian symmetric space

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

[Journal Article] Approximations of Lipschitz maps via Ehresmann fibrations and Reeb&apos;s sphere theorem for Lipschitz functions2022

Author(s)

Journal Title

DOI

ISSN

Language

Data Source

[Journal Article] Differentiable sphere theorems whose comparison spaces are standard sphere or exotic ones2020

Author(s)

Journal Title

NAID

Data Source

[Journal Article] Differentiable sphere theorems whose comparison spaces are standard sphere or exotic ones2020

Author(s)

Journal Title

NAID

Data Source

[Journal Article] Approximations of Lipschitz maps via immersions2017

Author(s)

Journal Title

DOI

Data Source

[Journal Article] TOPOLOGY OF COMPLETE FINSLER MANIFOLDS WITH RADIAL FLAG CURVATURE BOUNDED BELOW2014

Author(s)

Journal Title

DOI

NAID

ISSN

Language

Data Source

[Presentation] On the extension of Reeb-Milnor-Rosen's sphere theorem to Lipschitz functions, Pt.22023

Author(s)

Organizer

Data Source

[Presentation] On the extension of Reeb-Milnor-Rosen's sphere theorem to Lipschitz functions, Pt.12023

Author(s)

Organizer

Data Source

[Presentation] リプシッツ関数に関するレーブの球面定理2023

Kondo Kei 近藤慶

KONDO Kei 近藤慶

[Journal Article] Approximations of Lipschitz maps via Ehresmann fibrations and Reeb's sphere theorem for Lipschitz functions2022