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Study of discrete geometric analysis using numerical analysis and computer graphics

Research Project

Project/Area Number 19K03488
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 11020:Geometry-related
Research InstitutionNagoya University

Principal Investigator

内藤 久資  名古屋大学, 多元数理科学研究科, 教授 (40211411)

Project Period (FY) 2019-04-01 – 2025-03-31
Project Status Granted (Fiscal Year 2023)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2023: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Keywords離散幾何解析 / 離散曲面 / 深層ニューラルネットワーク / グラフ理論 / 幾何学的グラフ理論 / グラフの固有値
Outline of Research at the Start

本研究では, 数値計算およびコンピュータグラフィックスを利用して, 離散幾何解析の研究を行う. 特に, 離散幾何解析の中でも, 三分岐離散曲面の解析に重点をおく.
本研究では, 三分岐離散曲面の「細分」を適切に定義し, その収束理論を展開する. 応募者がこれまで に行ってきた研究では, 三分岐離散曲面に対する曲率の定義を行い, Mackay 型結晶(Schwarz P 曲面 の「離散化」と考えられる三分岐曲面)の細分を考察した. そこで, より一般の三分岐離散曲面を対象 として, 収束理論を展開して, そこであらわれる特異点と材料科学的な性質との関連を明らかにしたい.

Outline of Annual Research Achievements

1.3分岐離散調和曲面に対する局所的なワイエルシュトラス表現公式を構成した.さらに,それを用いて,3分岐離散調和曲面の細分列に対する収束定理を証明した. その具体例として,3分岐エネパー形調和曲面を構成し,その細分列は,古典的な極小曲面であるエネパー曲面に収束することを示した.
2.3次元ユークリッド空間内に配置された entangled graph および weaving の絡み合いを定義し,それらの間に反発項を含むエネルギーを定義することで,絡み合い成分ごとに,時間に対して 1/3 乗の速度で分離することを示した.
3.教師なし機械学習(ニューラルネットワーク)を用いて,複数粒子に関する1次元シュレディンガー方程式の基底状態およびいくつかの励起状態を計算した. 特に,複数のフェルミオンに対する状態を,ボソンに対する状態と同じ手法で計算した.
4.平面内の多角形および空間内の多面体を,簡単な教師データを用いたニューラルネットワークで生成できることを示した.

Current Status of Research Progress
Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

3分岐離散調和曲面に対するワイエルシュトラス表現公式を,局所的であっても構成することができ,それによって3分岐離散調和曲面の細分列に対する収束定理を示すことができた.

Strategy for Future Research Activity

我々が構成した3分岐離散調和曲面に対するワイエルシュトラス公式は局所的なものであり,例えば,この公式を用いて離散カテノイドを構成することはできない. このようなモノドロミーをもつ曲面にも適用可能なワイエルシュトラス形公式の構成を考える.
また,3次元空間に配置された3次元的グラフの絡み合いの反発力をもつエネルギーに関する安定構造を求める.

Report

(5 results)
  • 2023 Research-status Report
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (30 results)

All 2024 2023 2022 2021 2020 2019 Other

All Int'l Joint Research (1 results) Journal Article (9 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 7 results,  Open Access: 5 results) Presentation (19 results) (of which Int'l Joint Research: 8 results,  Invited: 12 results) Book (1 results)

  • [Int'l Joint Research] Northeast Normal University(中国)

    • Related Report
      2021 Research-status Report
  • [Journal Article] Neural Polytopes2024

    • Author(s)
      Koji Hashimoto, Tomoya Naito, and Hisashi Naito
    • Journal Title

      1st Workshop on the Synergy of Scientific and Machine Learning Modeling at ICML2023

      Volume: -

    • Related Report
      2023 Research-status Report
    • Peer Reviewed
  • [Journal Article] Multi-body wave function of ground and low-lying excited states using unornamented deep neural networks2023

    • Author(s)
      Tomoya Naito, Hisashi Naito, and Koji Hashimoto
    • Journal Title

      Phys. Rev. Research

      Volume: 9 Issue: 3 Pages: 033189-033189

    • DOI

      10.1103/physrevresearch.5.033189

    • Related Report
      2023 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] A simple method for multi-body wave function of ground and low-lying excited states using deep neural network2023

    • Author(s)
      Tomoya Naito, Hisashi Naito, and Koji Hashimoto
    • Journal Title

      arXiv

      Volume: -

    • Related Report
      2022 Research-status Report
    • Open Access
  • [Journal Article] Construction of continuum from a discrete surface by its iterated subdivisions2022

    • Author(s)
      Motoko Kotani, Hisashi Naito, and Chen Tao
    • Journal Title

      Tohoku Mathematical Journal

      Volume: 74 Issue: 2 Pages: 229-252

    • DOI

      10.2748/tmj.20201225

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Construction of continuum from a discrete surface by its iterated subdivisions2022

    • Author(s)
      Motoko Kotani, Hisashi Naito, and Chen Tao
    • Journal Title

      Tohoku Math. J.

      Volume: 74

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Construction of continuum from a discrete surface by its iterated subdivisions2021

    • Author(s)
      Motoko Kotani, Hisashi Naito, Chen Tao
    • Journal Title

      Tohoku Mathematical Journal (掲載決定済)

      Volume: -

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] A nitrogen-doped nanotube molecule with atom vacancy defects2020

    • Author(s)
      K. Ikemoto, S. Yang, H. Naito, M. Kotani, S. Sato, H. Sato
    • Journal Title

      Nature Communications

      Volume: 11, 1807 Issue: 1 Pages: 1807-1807

    • DOI

      10.1038/s41467-020-15662-6

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] A short lecture on topological crystallography and a discrete surface theory2020

    • Author(s)
      Hisashi NAITO
    • Journal Title

      Anam Lecture Notes in Mathematics

      Volume: 2 Pages: 83-147

    • Related Report
      2019 Research-status Report
    • Open Access
  • [Journal Article] Eigenvalues of the Laplacian on the Goldberg-Coxeter constructions for 3- and 4-valent graphs2019

    • Author(s)
      Toshiaki Omori, Hisashi Naito, and Tatsuya Tate
    • Journal Title

      Electron. J. Combin.

      Volume: 26

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 離散幾何解析と材料科学2024

    • Author(s)
      内藤久資
    • Organizer
      ワークショップ「離散幾何学~理論から物質を探求する~」
    • Related Report
      2023 Research-status Report
    • Invited
  • [Presentation] 変分問題とかニューラルネットワークとか多面体とか2023

    • Author(s)
      内藤久資
    • Organizer
      研究集会「多様体上の微分方程式
    • Related Report
      2023 Research-status Report
    • Invited
  • [Presentation] 双対グラフを用いた配位多面体に基づく結晶構造生成2023

    • Author(s)
      横山智康, 市川和秀, 内藤久資
    • Organizer
      2023年日本結晶学会年会
    • Related Report
      2023 Research-status Report
  • [Presentation] Construction of weaving structures by standard realizations with repulsive interactions2023

    • Author(s)
      Eriko Shinkawa, Motoko Kotani, and Hisashi Naito
    • Organizer
      Geometric Shape Generation II: Design, ICIAM 2023
    • Related Report
      2023 Research-status Report
    • Int'l Joint Research
  • [Presentation] Trivalent discrete surfaces and carbon structures2023

    • Author(s)
      Hisashi Naito
    • Organizer
      The 3rd Conference on Surfaces, Analysis, and Numerics
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 離散幾何解析とその物性科学への応用2022

    • Author(s)
      内藤久資
    • Organizer
      ワークショップ「物性と離散幾何学」
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] Topological Crystallography2021

    • Author(s)
      Hisashi Naito
    • Organizer
      MoSI Meeting at Nagoya University
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] Carbon structures and Geometry of Trivalent Discrete Surfaces2021

    • Author(s)
      Hisashi NAITO
    • Organizer
      International Conference on Discrete Geometric Analysis for Materials Design
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 3分岐離散曲面と炭素構造2021

    • Author(s)
      内藤久資
    • Organizer
      日本数学会2021年度年会
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] 周期孔を有する窒素ドープ型ナノチューブ分子2021

    • Author(s)
      梁承民,池本晃喜,内藤久資,小谷元子,佐藤宗太,磯部寛之
    • Organizer
      日本化学会第101春季年会
    • Related Report
      2020 Research-status Report
  • [Presentation] Carbon structures and a discrete surface theory2021

    • Author(s)
      Hisashi Naito
    • Organizer
      Mathematical Sciences of Visualization and Deeping of Symmetry and Moduli, Osaka City University
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 周期孔を有する窒素ドープ型ナノチューブ分子2020

    • Author(s)
      梁承民,池本晃喜,内藤久資,小谷元子,佐藤宗太,磯部寛之
    • Organizer
      日本化学会秋季事業 第10回CSJ化学フェスタ2020
    • Related Report
      2020 Research-status Report
  • [Presentation] Eigenvalues of the Laplacian on the Goldberg-Coxeter constructions for 3- and 4-valente graphs2019

    • Author(s)
      Toshiaki Omori, Hisashi Naito, and Tatsuya Tate
    • Organizer
      Mathematical Materials Sciences, MRM 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Carbon structures and a discrete surface theory2019

    • Author(s)
      Hisashi Naito, Toshiaki OmoriI, Chen Tao and Motoko Kotani
    • Organizer
      Mathematical Materials Sciences, MRM 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 離散幾何解析 -- 離散曲面論と材料科学への応用 --2019

    • Author(s)
      内藤久資
    • Organizer
      大阪市立大学
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] 結晶格子の標準実現とその物質科学への応用2019

    • Author(s)
      内藤久資
    • Organizer
      結晶の界面,転位,構造の先進数理解析 (九州大学 IMI 研究集会)
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] Crystal Structure and a Discrete Surface Theory2019

    • Author(s)
      Hisashi NAITO
    • Organizer
      International symposium of Polymers and networks via topology and entanglement
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 三分岐離散曲面の曲率と細分2019

    • Author(s)
      内藤久資
    • Organizer
      新学術領域「次世代物質探索のための離散幾何学」研究成果発表会
    • Related Report
      2019 Research-status Report
  • [Presentation] Crystal Structure and a Discrete Surface Theory2019

    • Author(s)
      Hisashi NAITO
    • Organizer
      Geometric shape generation: integrability, variational analysis and applications ICIAM 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Book] Trivalent Discrete Surfaces and Carbon Structures2023

    • Author(s)
      Hisashi Naito
    • Total Pages
      110
    • Publisher
      Springer
    • ISBN
      9789819957699
    • Related Report
      2023 Research-status Report

URL: 

Published: 2019-04-18   Modified: 2024-12-25  

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