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Study of surfaces from the perspective of singularity theory of mappings and its applications

Research Project

Project/Area Number 20K14312
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 11020:Geometry-related
Research InstitutionNagasaki University

Principal Investigator

Kabata Yutaro  長崎大学, 情報データ科学部, 助教 (40830097)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2023: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2022: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Keywords特異点論 / 曲面論 / 曲線論 / 射影 / 曲面復元問題 / 離散微分幾何学 / 負定曲率曲面 / 特徴線 / 古典微分幾何学 / 曲面 / 曲線 / 混合分布 / 写像の微分幾何学 / 曲線族 / ガウス曲率負一定曲面 / 視覚の数理 / 輪郭 / 局所微分幾何学 / 直行射影 / 接触 / 曲面曲線 / 極小曲面 / 視覚の数理モデル
Outline of Research at the Start

本研究では曲面や曲線とその射影写像に関して,退化した点の周りでの微分幾何学的研究方法の確立を目的とする.具体的には,特異点論の手法を援用しながら以下A,Bのテーマを明らかにする.A. 曲面や曲線の退化した点近傍での種々の不変量の構成とその幾何学的な意味の決定.B. 曲面(曲線)と射影の輪郭(像)それぞれの不変量の関係式の明示的な決定.さらに得られた結果を用いて,極小曲面の局所的性質の研究や視覚の数理モデルへの応用研究にも取り組む.

Outline of Final Research Achievements

During the research period, I conducted [A] Differential geometric studies of curves and surfaces, and [B] Research on projections of curves and surfaces. In particular, the following are notable research achievements:
(1) Regarding the study of 2-solitons of surfaces with negative Gaussian curvature, through collaborative research we obtained classification results on the distribution of singularity-theoretically important feature lines (ridge lines, flecnodal curves), and obtained good graphics that clearly visualize the results. (2) Through collaborative research, we found a new approach to the surface reconstruction problem for projections of surfaces with special patterns, and wrote a paper on it. (3) Through collaborative research, we studied discrete surfaces with constant principal curvatures and wrote a paper on the results (already accepted for publication).

Academic Significance and Societal Importance of the Research Achievements

曲面論は古くから研究されているが,現代の特異点論を用いた新しい観点での研究が近年は盛んになっている.本研究もその流れを汲んでおり,特異点論でよく研究されているridgeやflecnodal curveに注目することで負定曲率曲面のわかりやすい分類を得ることができた.また,主曲率一定離散曲面に関する研究は材料科学の問題に端を発しており,新規の物質の性質の説明に寄与できる可能性がある.さらに,模様を持った曲面の射影に関する研究は,コンピュータービジョンで重要な問題である曲面復元問題に新しいアプローチを提供しており,今後さまざまな応用の可能性があると考えている.

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (19 results)

All 2024 2023 2022 2021 Other

All Int'l Joint Research (4 results) Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 2 results) Presentation (10 results) (of which Int'l Joint Research: 2 results,  Invited: 5 results) Remarks (1 results)

  • [Int'l Joint Research] UFSC(ブラジル)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] UFSC(ブラジル)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] Sanford Burnham Prebys(米国)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] UFSC(ブラジル)

    • Related Report
      2020 Research-status Report
  • [Journal Article] On discrete constant principal curvature surfaces2024

    • Author(s)
      Kabata Yutaro、Matsutani Shigeki、Ogata Yuta
    • Journal Title

      Computer Aided Geometric Design

      Volume: ー Pages: 102289-102289

    • DOI

      10.1016/j.cagd.2024.102289

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Three-dimensional topological radiogenomics of epidermal growth factor receptor Del19 and L858R mutation subtypes on computed tomography images of lung cancer patients2023

    • Author(s)
      Ninomiya Kenta、Arimura Hidetaka、Tanaka Kentaro、Chan Wai Yee、Kabata Yutaro、Mizuno Shinichi、Gowdh Nadia Fareeda Muhammad、Yaakup Nur Adura、Liam Chong-Kin、Chai Chee-Shee、Ng Kwan Hoong
    • Journal Title

      Computer Methods and Programs in Biomedicine

      Volume: Epub ahead of print Pages: 107544-107544

    • DOI

      10.1016/j.cmpb.2023.107544

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] One‐parameter families of Legendre curves and plane line congruences2022

    • Author(s)
      Kabata Yutaro、Takahashi Masatomo
    • Journal Title

      Mathematische Nachrichten

      Volume: 295 Issue: 8 Pages: 1533-1561

    • DOI

      10.1002/mana.201900327

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Criteria for sharksfin and deltoid singularities from the plane into the plane and their applications2021

    • Author(s)
      Kabata Yutaro、Saji Kentaro
    • Journal Title

      Beitrege zur Algebra und Geometrie / Contributions to Algebra and Geometry

      Volume: - Issue: 4 Pages: 763-774

    • DOI

      10.1007/s13366-021-00606-y

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] 多目的最適化問題の幾何学と混合分布2023

    • Author(s)
      加葉田雄太朗
    • Organizer
      評価のOR第101回研究会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 写像の観点からの混合正規分布の峰の研究2023

    • Author(s)
      加葉田雄太朗
    • Organizer
      統計連合大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Surface parametrization for manufacturing by principal curvature integral2023

    • Author(s)
      加葉田雄太朗
    • Organizer
      ICIAM 2023
    • Related Report
      2023 Annual Research Report
  • [Presentation] 曲面上の曲線の射影の微分幾何2022

    • Author(s)
      加葉田雄太朗
    • Organizer
      京都産業大学数理科学科談話会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] Several extensions of Koenderink's formula2022

    • Author(s)
      Yutaro Kabata
    • Organizer
      MSJSI
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] 多目的最適化問題の幾何とその応用2022

    • Author(s)
      加葉田雄太朗
    • Organizer
      統計連合大会
    • Related Report
      2022 Research-status Report
  • [Presentation] 曲面上のガウス写像と直交射影,それぞれの特異点の関係について2022

    • Author(s)
      加葉田雄太朗
    • Organizer
      金沢創発数理セミナー
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] 特異点論からの輪郭研究2022

    • Author(s)
      加葉田雄太朗
    • Organizer
      3次元画像コンファレンス
    • Related Report
      2022 Research-status Report
  • [Presentation] Local geometry of surfaces at parabolic points2021

    • Author(s)
      Yutaro Kabata
    • Organizer
      Singularity theory and its applications
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 曲面とその射影像の局所幾何学2021

    • Author(s)
      加葉田雄太朗
    • Organizer
      接触構造、特異点、微分方程式及びその周辺
    • Related Report
      2020 Research-status Report
    • Invited
  • [Remarks] 長崎大学情報データ科学部教員紹介HP

    • URL

      https://www.idsci.nagasaki-u.ac.jp/research_ac/facultylist/staff27/

    • Related Report
      2020 Research-status Report

URL: 

Published: 2020-04-28   Modified: 2025-01-30  

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