Koga Isami 古賀勇

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KOGA Isami 古賀勇

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Researcher Number	60782232
Other IDs
Affiliation (Current)	2026: 九州国際大学, 現代ビジネス学部, 准教授
Affiliation (based on the past Project Information) *help	2024: 九州国際大学, 現代ビジネス学部, 准教授 2022 – 2023: 広島大学, 先進理工系科学研究科(理), 研究員 2018 – 2021: 明治大学, 理工学部, 助教 2016: 九州大学, 大学院・数理学府, 博士研究員
Review Section/Research Field	Principal Investigator Basic Section 11020:Geometry-related Except Principal Investigator Geometry
Keywords	Principal Investigator 等質ベクトル束 / 正則等長写像 / 調和解析 / 正則ベクトル束 / 部分多様体 / 表現論 / 同変正則写像 / 同変調和写像 / 3次元球面 / 四元数射影空間 … More / 複素グラスマン多様体 / 同変写像 / モジュライ / 接続の理論 / ゲージ理論 / ベクトル束 / 射影空間 / グラスマン多様体 / 調和写像 / 正則写像 … More Except Principal Investigator 表現論 / モジュライ空間 / 正則写像 / 調和写像 / ゲージ理論 / ベクトル束 Less

A study of holomorphic isometric maps of Riemann sphere into the complex GrassmanniansPrincipal Investigator
- Principal Investigator
  
  Koga Isami
- Project Period (FY)
  2018 – 2024
- Research Category
  
  Grant-in-Aid for Early-Career Scientists
- Review Section
  
  Basic Section 11020:Geometry-related
- Research Institution
  Kyushu International University
  Hiroshima University
  Meiji University
ADHM-construction of vector bundles and harmonic maps
- Principal Investigator
  
  NAGATOMO yasuyuki
- Project Period (FY)
  2014 – 2016
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Geometry
- Research Institution
  Meiji University

All 2025 2024 2023 2022 2021 2019 2017

All Journal Article Presentation

[Journal Article] Harmonic Totally Real Maps of the 3-Spheres into the Complex Projective Spaces2025
- Author(s)
  Koga Isami, Nagatomo Yasuyuki
- Journal Title
  
  Osaka Journal of Mathematics
  
  Volume: -
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-18K13411
[Journal Article] Equivariant Harmonic Maps of the Complex Projective Line into Complex Grassmannians of Rank Two2025
- Author(s)
  Koga Isami, Nagatomo Yasuyuki
- Journal Title
  
  Tsukuba Journal of Mathematics
  
  Volume: -
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-18K13411
[Journal Article] Equivariant harmonic maps of the complex projective spaces into the quaternion projective spaces2024
- Author(s)
  Koga Isami、Nagatomo Yasuyuki
- Journal Title
  
  Differential Geometry and its Applications
  
  Volume: 96 Pages: 102167-102167
- DOI
  10.1016/j.difgeo.2024.102167
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-18K13411
[Journal Article] Equivariant holomorphic embeddings from the complex projective line into complex Grassmannian of 2-planes2022
- Author(s)
  Isami Koga, Yasuyuki Nagatomo
- Journal Title
  
  Osaka Journal of Mathematics
  
  Volume: 59 Pages: 495-514
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-18K13411
[Presentation] 球面，複素射影空間，四元数射影空間を終域とする調和写像のモジュライ空間の構成2025
- Author(s)
  古賀勇
- Organizer
  九州大学幾何学セミナー
- Invited
- Data Source
  KAKENHI-PROJECT-18K13411
[Presentation] 複素射影空間，四元数射影空間を終域とする調和写像のモジュライ空間の構成2024
- Author(s)
  古賀勇
- Organizer
  東京都立大学幾何学セミナー
- Invited
- Data Source
  KAKENHI-PROJECT-18K13411
[Presentation] 3次元球面から複素射影空間への全実調和写像の分類2024
- Author(s)
  古賀勇，長友康行
- Organizer
  日本数学会2024年度年会
- Data Source
  KAKENHI-PROJECT-18K13411
[Presentation] 複素射影空間から複素射影空間へのシンプレクティック群同変調和写像の分類2024
- Author(s)
  古賀勇，長友康行
- Organizer
  日本数学会秋季総合分科会2024
- Data Source
  KAKENHI-PROJECT-18K13411
[Presentation] 複素射影空間を定義域とする同変調和写像について2024
- Author(s)
  古賀勇
- Organizer
  部分多様体幾何とリー群作用2024
- Invited
- Data Source
  KAKENHI-PROJECT-18K13411
[Presentation] 複素射影空間から四元数射影空間への同変調和写像2023
- Author(s)
  古賀勇，長友康行
- Organizer
  日本数学会2023年度秋季総合分科会
- Data Source
  KAKENHI-PROJECT-18K13411
[Presentation] Equivariant harmonic immersions of the complex projective line into the complex Grassmannians of two-planes2022
- Author(s)
  Isami Koga
- Organizer
  Differential Geometry Workshop2022
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-18K13411
[Presentation] 複素グラスマン多様体への同変調和写像について2022
- Author(s)
  古賀勇
- Organizer
  測地線及び関連する諸問題
- Invited
- Data Source
  KAKENHI-PROJECT-18K13411
[Presentation] Equivariant harmonic immersions of the complex projective line into the complex Grassmannians of two-planes2022
- Author(s)
  Isami Koga
- Organizer
  Applications of Harmonic Maps and Higgs bundles
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-18K13411
[Presentation] 複素射影直線から複素グラスマン多様体への同変調和写像の分類2022
- Author(s)
  古賀勇，長友康行
- Organizer
  日本数学会2022年度会
- Invited
- Data Source
  KAKENHI-PROJECT-18K13411
[Presentation] Equivariant harmonic immersions of the complex projective line into the comlex Grassmannian of two-planes2022
- Author(s)
  Isami Koga
- Organizer
  Differential Geometry and Integrable Systems
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-18K13411
[Presentation] 複素グラスマン多様体への同変調和写像について2021
- Author(s)
  古賀勇
- Organizer
  東北大学幾何学セミナー
- Invited
- Data Source
  KAKENHI-PROJECT-18K13411
[Presentation] Equivariant minimal isometric immersions from the complex projective line into the complex Grassmannian manifolds of two-planes2019
- Author(s)
  Isami Koga
- Organizer
  The 2nd International Conference "Geometry of Submanifolds and Integrable Systems"
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-18K13411
[Presentation] 複素射影空間から複素グラスマン多様体への同変正則写像の構成2019
- Author(s)
  古賀勇
- Organizer
  日本数学会2019年度会
- Data Source
  KAKENHI-PROJECT-18K13411
[Presentation] 複素射影空間上のベクトル束と誘導者像について2019
- Author(s)
  古賀勇
- Organizer
  第66回幾何学シンポジウム
- Data Source
  KAKENHI-PROJECT-18K13411
[Presentation] 複素射影空間から複素グラスマン多様体への同変正則写像の構成2019
- Author(s)
  古賀勇
- Organizer
  測地線及び関連する諸問題
- Invited
- Data Source
  KAKENHI-PROJECT-18K13411
[Presentation] 複素射影直線から複素グラスマン多様体への同変調和写像の構成と分類2019
- Author(s)
  古賀勇
- Organizer
  日本数学会2019年度会
- Data Source
  KAKENHI-PROJECT-18K13411
[Presentation] ベクトル束と誘導写像2019
- Author(s)
  古賀勇
- Organizer
  測地線及び関連する諸問題
- Invited
- Data Source
  KAKENHI-PROJECT-18K13411
[Presentation] 複素射影直線から階数２の複素グラスマン多様体への同変正則埋め込みの分類2017
- Author(s)
  古賀勇、長友康行
- Organizer
  日本数学会
- Place of Presentation
  首都大学東京
- Year and Date
  2017-03-24
- Data Source
  KAKENHI-PROJECT-26400074

1. NAGATOMO yasuyuki (10266075)

# of Collaborated Projects: 1 results

# of Collaborated Products: 1 results
2. TAKAHASHI masaro (70311107)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
3. Oscar Macia

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results

Koga Isami 古賀 勇

KOGA Isami 古賀 勇

Research Projects

Research Products

Co-Researchers

A study of holomorphic isometric maps of Riemann sphere into the complex GrassmanniansPrincipal Investigator

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

ADHM-construction of vector bundles and harmonic maps

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

[Journal Article] Harmonic Totally Real Maps of the 3-Spheres into the Complex Projective Spaces2025

Author(s)

Journal Title

Data Source

[Journal Article] Equivariant Harmonic Maps of the Complex Projective Line into Complex Grassmannians of Rank Two2025

Author(s)

Journal Title

Data Source

[Journal Article] Equivariant harmonic maps of the complex projective spaces into the quaternion projective spaces2024

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Equivariant holomorphic embeddings from the complex projective line into complex Grassmannian of 2-planes2022

Author(s)

Journal Title

Data Source

[Presentation] 球面，複素射影空間，四元数射影空間を終域とする調和写像のモジュライ空間の構成2025

Author(s)

Organizer

Data Source

[Presentation] 複素射影空間，四元数射影空間を終域とする調和写像のモジュライ空間の構成2024

Author(s)

Organizer

Data Source

[Presentation] 3次元球面から複素射影空間への全実調和写像の分類2024

Author(s)

Organizer

Data Source

[Presentation] 複素射影空間から複素射影空間へのシンプレクティック群同変調和写像の分類2024

Author(s)

Organizer

Data Source

[Presentation] 複素射影空間を定義域とする同変調和写像について2024

Author(s)

Organizer

Data Source

[Presentation] 複素射影空間から四元数射影空間への同変調和写像2023

Author(s)

Organizer

Data Source

[Presentation] Equivariant harmonic immersions of the complex projective line into the complex Grassmannians of two-planes2022

Author(s)

Organizer

Data Source

[Presentation] 複素グラスマン多様体への同変調和写像について2022

Author(s)

Organizer

Data Source

[Presentation] Equivariant harmonic immersions of the complex projective line into the complex Grassmannians of two-planes2022

Author(s)

Organizer

Data Source

[Presentation] 複素射影直線から複素グラスマン多様体への同変調和写像の分類2022

Author(s)

Organizer

Data Source

[Presentation] Equivariant harmonic immersions of the complex projective line into the comlex Grassmannian of two-planes2022

Author(s)

Organizer

Data Source

[Presentation] 複素グラスマン多様体への同変調和写像について2021

Author(s)

Koga Isami 古賀勇

KOGA Isami 古賀勇