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Geometric variational problems and discrete geometry with numerical analysis

Research Project

Project/Area Number 26400067
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Geometry
Research InstitutionNagoya University

Principal Investigator

Naito Hisashi  名古屋大学, 多元数理科学研究科, 准教授 (40211411)

Project Period (FY) 2014-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Keywordsdiscrete surfaces / 離散幾何解析 / ラプラシアンの固有値 / 離散曲面 / グラフの固有値 / 離散幾何学 / 微分幾何学 / 曲面論 / 数値解析 / 負曲率炭素構造
Outline of Final Research Achievements

We study geometry of trivalent discrete surfaces. In paricular, we define vertex-wise Gauss and mean curvatures for trivalent discrete surfaces in 3-dimensional Euclidean spaces. In our study, we take Carbon nanotubes, Fullerens, and Mackay structures, and we show that the Mackay structure of type P is vertex-wise negatively curved, which is called "a negatively graphene" in material sciences and organic chemistry.
Moreover, we study subdivision of trivalent discrete surfaces. In particular, we show the Hausdorff convergence of the sequence of minimum energies of Mackay structures.

Academic Significance and Societal Importance of the Research Achievements

従来の離散曲面論は,連続曲面の離散化として離散曲面を定義していた. この研究では,分子構造・結晶構造をモデルとした,本質的に離散な曲面を対象とし,その幾何学を展開したことに重要な意義がある. しかも,単純に曲率を定義するだけではなく,離散曲面の細分を定義することにより,収束理論への道を開いた. 一般に,分子構造・決s高構造のミクロな解析では離散的なオブジェクトとしてそれらを扱うが,収束理論を通じて,マクロな連続的なオブジェクトを扱うことができる可能性を示した.

Report

(7 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • 2016 Research-status Report
  • 2015 Research-status Report
  • 2014 Research-status Report
  • Research Products

    (31 results)

All 2020 2019 2018 2017 2016 2015 2014

All Journal Article (9 results) (of which Peer Reviewed: 7 results,  Open Access: 4 results,  Acknowledgement Compliant: 3 results) Presentation (22 results) (of which Int'l Joint Research: 10 results,  Invited: 18 results)

  • [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

    • Related Report
      2019 Annual Research 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, Tatsuya Tate
    • Journal Title

      Electron. J. Combin.

      Volume: 26

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] A discrete surface theory2017

    • Author(s)
      Motoko Kotani, Hisashi Naito, Toshiaki Omori
    • Journal Title

      Computer Aided Geometric Design

      Volume: 58 Pages: 24-54

    • DOI

      10.1016/j.cagd.2017.09.002

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Construction of negatively curved cubic carbon crystals via standard realizations2016

    • Author(s)
      Hisashi Naito
    • Journal Title

      Springer Proceedings in Mathematics and Statistics

      Volume: 166 Pages: 83-100

    • DOI

      10.1007/978-4-431-56104-0_5

    • ISBN
      9784431561026, 9784431561040
    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Construction of negatively curved cubic carbon crystals via standard realizations2016

    • Author(s)
      Hisashi Naito
    • Journal Title

      Springer Lecture Notes in Mathematics and Statistics

      Volume: 未定

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Numerical studies of the optimization of the first eigenvalue of the heat diffusion in inhomogenoues media2015

    • Author(s)
      Kagame Matsue and Hisashi Naito
    • Journal Title

      Japan Journal of Industrial and Applied Mathematics

      Volume: 32 Issue: 2 Pages: 489-512

    • DOI

      10.1007/s13160-015-0177-5

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] 化学と幾何学~離散幾何学と炭素構造2015

    • Author(s)
      内藤久資
    • Journal Title

      数理科学

      Volume: 624 Pages: 42-47

    • Related Report
      2015 Research-status Report
  • [Journal Article] Negatively curved cubic carbon crystals with octahedral symmetry2014

    • Author(s)
      MakotoTagami, Yunye Liang, Hisashi Naito, Yoshiyuki Kawazoe, Motoko Kotani
    • Journal Title

      Carbon

      Volume: 76 Pages: 266-274

    • DOI

      10.1016/j.carbon.2014.04.077

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Conformal change of Riemannian metrics and biharmonic maps2014

    • Author(s)
      Hisashi Naito, Hajime Urakawa
    • Journal Title

      Indiana Univ. Math. J.

      Volume: 63 Issue: 6 Pages: 1631-1657

    • DOI

      10.1512/iumj.2014.63.5424

    • Related Report
      2014 Research-status Report
    • Peer Reviewed
  • [Presentation] Discrete geometric analysis -- crystal structure, a discrete surface theory and its applications to physics and chemistry --2019

    • Author(s)
      Hisashi NAITO
    • Organizer
      Introductory workshop on discrete differential geometry
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [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 Annual Research Report
    • Int'l Joint Research / 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 Annual Research Report
    • Int'l Joint Research / 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
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Carbon structures and a discrete surface theory2019

    • Author(s)
      Hisashi Naito, Motoko Kotani, Chen Tao, Toshiaki Omori
    • Organizer
      Mathematical Materials Sciences, MRM 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Eigenvalues of the Laplacian on the Goldberg-Coxeter constructions for 3- and 4-valente graphs2019

    • Author(s)
      Toshiaki Omori, Tatsuya Tate, Hisashi NAITO
    • Organizer
      Mathematical Materials Sciences, MRM 2019
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] Discrete geometric analysis -- crystal structure, a discrete surface theory and its applications to physics and chemistry --2019

    • Author(s)
      Hisashi NAITO
    • Organizer
      Introductory workshop on discrete differential geometry
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 炭素構造・結晶格子・離散曲面2018

    • Author(s)
      内藤久資
    • Organizer
      名古屋大学,物質と幾何セミナー
    • Related Report
      2018 Research-status Report
  • [Presentation] Analysis of phase transitions using minimal surfaces2018

    • Author(s)
      Hisashi Naito
    • Organizer
      Discrete Geometric Analysis for Materials Design
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 三分岐離散調和曲面の収束2018

    • Author(s)
      内藤久資
    • Organizer
      多様体上の微分方程式
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] 炭素構造と離散幾何解析2018

    • Author(s)
      内藤久資
    • Organizer
      幾何学を指標とする化学構造と機能物性
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] 離散幾何解析と結晶構造2016

    • Author(s)
      内藤 久資
    • Organizer
      熊本大学幾何学セミナー
    • Place of Presentation
      熊本大学
    • Year and Date
      2016-05-30
    • Related Report
      2016 Research-status Report
    • Invited
  • [Presentation] Discrete geometric analysis and fullerene structures2016

    • Author(s)
      Hisashi Naito
    • Organizer
      The A3 mini-workshop on soft matter
    • Place of Presentation
      北京航空航天大学
    • Year and Date
      2016-03-23
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 幾何学の応用を考えるー離散幾何学から結晶構造へー2016

    • Author(s)
      内藤久資
    • Organizer
      名古屋大学数学教育セミナー
    • Place of Presentation
      名古屋大学
    • Year and Date
      2016-02-20
    • Related Report
      2015 Research-status Report
    • Invited
  • [Presentation] Carbon structures and trivalent discrete surfaces2016

    • Author(s)
      Hisashi Naito
    • Organizer
      A3 Foresight Program Modeling and Simulation of Hierarchical and Heterogeneous Flow System with Applications to Materials Science
    • Place of Presentation
      Tohoku University
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Carbon structures and trivalent discrete surfaces2016

    • Author(s)
      Hisashi Naito
    • Organizer
      Geometry and Materials Sciences 2016
    • Place of Presentation
      Okinawa Institute of Sciences and Technologies
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 三分岐離散曲面の曲率と細分2016

    • Author(s)
      内藤 久資
    • Organizer
      東京工業大学幾何学セミナー
    • Place of Presentation
      東京工業大学
    • Related Report
      2016 Research-status Report
    • Invited
  • [Presentation] 幾何学者は化学の夢を見るか2015

    • Author(s)
      内藤久資
    • Organizer
      Intersection of Pure Mathematics and Applied Mathematics VIII
    • Place of Presentation
      九州大学
    • Year and Date
      2015-02-20
    • Related Report
      2014 Research-status Report
    • Invited
  • [Presentation] Numerical studies of the optimization of the first eigenvalue for the heat diffusion in inhomogeneous media2015

    • Author(s)
      Kaname Matsue, Hisashi Naito
    • Organizer
      AIMR International Symposium 2015
    • Place of Presentation
      仙台国際会舘
    • Year and Date
      2015-02-17
    • Related Report
      2014 Research-status Report
  • [Presentation] 結晶格子の標準実現と炭素結晶2014

    • Author(s)
      内藤久資
    • Organizer
      日本応用数理学会2014年年会
    • Place of Presentation
      政策研究大学院大学
    • Year and Date
      2014-09-04
    • Related Report
      2014 Research-status Report
    • Invited
  • [Presentation] Negatively curved carbon crystal2014

    • Author(s)
      Hisashi Naito
    • Organizer
      RIMS International Conference: Mathematical Challenge to a New Phase of Material Science
    • Place of Presentation
      RIMS, Kyoto University
    • Year and Date
      2014-08-06
    • Related Report
      2014 Research-status Report
    • Invited
  • [Presentation] Negatively curved carbon networks2014

    • Author(s)
      Hisashi Naito
    • Organizer
      Pattern formation: mathmatics and materials
    • Place of Presentation
      Australian National University
    • Year and Date
      2014-04-29 – 2014-04-30
    • Related Report
      2014 Research-status Report

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Published: 2014-04-04   Modified: 2021-02-19  

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