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Deformation and flatness of information geometric structure and their applications

Research Project

Project/Area Number 15K04997
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Foundations of mathematics/Applied mathematics
Research InstitutionUniversity of Fukui

Principal Investigator

Ohara Atsumi  福井大学, 学術研究院工学系部門, 教授 (90221168)

Project Period (FY) 2015-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywords非指数型確率分布 / 情報幾何学 / 統計多様体 / 共形平坦化 / 対称錐 / 非線形拡散現象 / 情報幾何 / 二重自己平行性 / 一般化指数分布族 / ネットワーク拡散方程式 / 二重自己平行 / 統計モデル / 最適化 / 双対接続 / 一般化指数型分布族 / 一般化指数型分布 / 正定値対称行列 / 計算アルゴリズム
Outline of Final Research Achievements

A1. Mathematical analysis by conformal flattening technique in information geometry: conformal flattening technique which transform non-flat statistical manifolds to dually flat ones is derived and its properties are investigated. The non-flat manifolds can be regarded as a generalized exponential family.
A2. Application of information geometry on probability simplex and a cone of positive definite symmetric matrices corresponding to generalized exponential family: Computational algorithms dealing with generalized exponential densities are performed on their parameter spaces. Using dually flat geometry defined on these spaces, we developed the algorithms such as robust parameter estimation, mathematical optimization, and pattern classification.

Academic Significance and Societal Importance of the Research Achievements

本研究の意義は,計画に沿った成果をあげることで関連する多くの学問分野に新しい知見と刺激を与える波及効果を及ぼすことに加えて,前述したような高い社会的要請にも対処できるデータ解析手法を提示するという実用面への貢献もあげることができる.

Report

(6 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
  • Research Products

    (21 results)

All 2020 2019 2018 2017 2016 2015

All Journal Article (11 results) (of which Peer Reviewed: 7 results,  Open Access: 1 results) Presentation (9 results) (of which Int'l Joint Research: 8 results,  Invited: 3 results) Book (1 results)

  • [Journal Article] Behaviors of solutions to network diffusion equation with power-nonlinearity A role of the q-exponential function for sufficiently large power-exponent2020

    • Author(s)
      Xiaoyan Zhang, Taiga Senyo, Hiroto Sakai, and Atsumi Ohara
    • Journal Title

      Eur. Phys. J. Special Topics

      Volume: 229 Issue: 5 Pages: 729-741

    • DOI

      10.1140/epjst/e2020-900202-5

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Doubly Autoparallel Structure on Positive Definite Matrices and Its Applications2019

    • Author(s)
      Atsumi Ohara
    • Journal Title

      F. Nielsen and F. Barbaresco (Eds.): GSI 2019, Springer Lec. Notes in Comp. Science

      Volume: 11712 Pages: 251-260

    • DOI

      10.1007/978-3-030-26980-7_26

    • ISBN
      9783030269791, 9783030269807
    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Conformal Flattening on the Probability Simplex and Its Applications to Voronoi Partitions and Centroids2019

    • Author(s)
      Atsumi Ohara
    • Journal Title

      Geometric Structure of Information (Frank Nielsen eds.) Springer

      Volume: - Pages: 51-68

    • DOI

      10.1007/978-3-030-02520-5_4

    • ISBN
      9783030025199, 9783030025205
    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Information Geometry Associated with Generalized Means2018

    • Author(s)
      Shinto Eguchi, Osamu Komori and Atsumi Ohara
    • Journal Title

      Information geometry and its applications (N. Ay et al. eds.), Springer proceedings in Mathematics and Statistics

      Volume: 252 Pages: 279-296

    • DOI

      10.1007/978-3-319-97798-0_10

    • ISBN
      9783319977973, 9783319977980
    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Doubly autoparallel structure on the probability simplex2018

    • Author(s)
      Atsumi Ohara and Hideyuki Ishi
    • Journal Title

      Information geometry and its applications (N. Ay et al. eds.), Springer proceedings in Mathematics and Statistics

      Volume: 252 Pages: 323-334

    • DOI

      10.1007/978-3-319-97798-0_12

    • ISBN
      9783319977973, 9783319977980
    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Conformal Flattening for Deformed Information Geometries on the Probability Simplex2018

    • Author(s)
      Atsumi Ohara
    • Journal Title

      Entropy

      Volume: 20 Issue: 3 Pages: 186-198

    • DOI

      10.3390/e20030186

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] 正定値行列の情報幾何(1) 双対的な幾何構造の導入2016

    • Author(s)
      小原,土谷
    • Journal Title

      岩波データサイエンス

      Volume: 2 Pages: 130-140

    • Related Report
      2016 Research-status Report
  • [Journal Article] 正定値行列の情報幾何(2) ガウシャングラフィカルモデリングから凸最適化へ2016

    • Author(s)
      小原,土谷
    • Journal Title

      岩波データサイエンス

      Volume: 3 Pages: 137-149

    • Related Report
      2016 Research-status Report
  • [Journal Article] 正定値行列の情報幾何(3) 計算の手間と曲率2016

    • Author(s)
      小原,土谷
    • Journal Title

      岩波データサイエンス

      Volume: 4 Pages: 146-158

    • Related Report
      2016 Research-status Report
  • [Journal Article] Vポテンシャルから導かれる正定値対称行列空間の幾何とその応用2015

    • Author(s)
      小原敦美,江口真透
    • Journal Title

      数理解析研究所考究録

      Volume: 1953 Pages: 69-87

    • Related Report
      2015 Research-status Report
    • Open Access
  • [Journal Article] Duality in a maximum generalized entropy model2015

    • Author(s)
      Shinto Eguchi, Osamu Komori and Atsumi Ohara
    • Journal Title

      AIP conference proceedings

      Volume: 1641 Pages: 297-304

    • DOI

      10.1063/1.4905991

    • Related Report
      2015 Research-status Report
    • Peer Reviewed
  • [Presentation] Study for a certain nonlinear diffusion equation on finite networks2019

    • Author(s)
      Atsumi Ohara
    • Organizer
      Erice school of complexity XVI course
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] An affine differential geometric aspect of doubly autoparallelism2019

    • Author(s)
      Atsumi Ohara
    • Organizer
      Information Geometry and Affine Differential Geometry III
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Behavioral Analysis of Certain Nonlinear Diffusion Equationsvia Information Geometry2018

    • Author(s)
      Atsumi Ohara
    • Organizer
      The Ninth International Conference on Guided Self-Organisation GSO2018
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Doubly Autoparallelism on Symmetric Cones and its Applications2017

    • Author(s)
      Atsumi Ohara
    • Organizer
      Workshop "Development of Matrix Analysis"
    • Place of Presentation
      Nagoya Univesity
    • Year and Date
      2017-03-28
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] ヘッセ領域上の群不変ポテンシャル2017

    • Author(s)
      伊師,小原
    • Organizer
      日本数学会
    • Place of Presentation
      首都大学東京大沢キャンパス
    • Year and Date
      2017-03-24
    • Related Report
      2016 Research-status Report
  • [Presentation] Doubly autoparallelism on the space of probability distributions2017

    • Author(s)
      Atsumi Ohara
    • Organizer
      International conference of statistical physics 2017
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] On affine immersions of probability simplex and their conformal flattening2017

    • Author(s)
      Atsumi Ohara
    • Organizer
      The third international conference Geometric Science of Information 2017
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Doubly Autoparallel Structure on Statistical Manifolds and its Applications2016

    • Author(s)
      Atsumi Ohara
    • Organizer
      Information Geometry and its Applications IV
    • Place of Presentation
      Liblice, Czech Republic
    • Year and Date
      2016-06-12
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Information geometry on multivariate generalized Gaussian densities and its group invariance2015

    • Author(s)
      Atsumi Ohara
    • Organizer
      Computational information geometry for image and signal processing
    • Place of Presentation
      Internatilnal Centre for Mathematical Science, The university of Edingburgh
    • Year and Date
      2015-09-21
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research / Invited
  • [Book] 行列不等式アプローチによる制御系設計2016

    • Author(s)
      小原 敦美
    • Total Pages
      251
    • Publisher
      コロナ社
    • Related Report
      2015 Research-status Report

URL: 

Published: 2015-04-16   Modified: 2021-02-19  

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