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NISHIMURA TAKASHI  西村 尚史

… Alternative Names

西村 尚史  ニシムラ タカシ

NISHIMURA Takashi  西村 尚史

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Researcher Number 80189307
Other IDs
  • ORCIDhttps://orcid.org/0000-0001-6855-9335
Affiliation (Current) 2025: 横浜国立大学, 大学院環境情報研究院, 非常勤教員
Affiliation (based on the past Project Information) *help 2023: 横浜国立大学, 大学院環境情報研究院, 非常勤教員
2017 – 2019: 横浜国立大学, 大学院環境情報研究院, 教授
2014 – 2015: 横浜国立大学, 環境情報研究科(研究院), 教授
2002 – 2003: 横浜国立大学, 教育人間科学部, 助教授
1997 – 1999: 横浜国立大学, 教育人間科学部, 助教授
1993 – 1995: 横浜国立大学, 教育学部, 助教授
1989 – 1990: 横浜国立大学, 教育学部, 助手
Review Section/Research Field
Principal Investigator
Basic Section 11020:Geometry-related / Geometry / Geometry / Foundations of mathematics/Applied mathematics
Except Principal Investigator
Algebra / General mathematics (including Probability theory/Statistical mathematics) / Geometry / 解析学
Keywords
Principal Investigator
フロンタル / 可微分写像の特異点論 / convex integrand / ウルフ図形 / 超平面族 / 超曲面族 / frontal / Gauss mapping / creative condition / envelope … More / ガウス写像 / 創造的条件 / 包絡超曲面 / 安定写像 / Convex integrand / Lowerable vector field / 一般化された距離二乗写像 / ヤコビアン二乗関数芽 / 球面双対変換 / フロンタル. / anti-orthotomic, / orthotomic, / Kato's chaos, / ウルフ図形, / 球面ウルフ図形, / isometry, / 球面双対変換, / 可微分写像 / 特異点 / 持ち上げ可能ベクトル場 / 距離二乗写像 / France : Germany / International Research / Mather Theory / Recognition Problem / Singularity of Differentiable Mapping / ドイツ / 可微分写像の特異点 / フランス:ドイツ / 国際研究者交流 / マザー理論 / 認識問題 / 双対ウルフ図形 / ペダル / 視覚理論 / 結晶理論 / 特異点論 / 安定関数 / 等幅 / 球面凸体 / 狭義凸 / 双対 convex integrand / 安定 convex integrand / 自己双対ウルフ図形 / 球面極変換 / no-silhouette … More
Except Principal Investigator
次数付き環 / ゴレンスタイン環 / 特異点 / ヒルベルト関数 / コーエン・マコーレー加群 / ネーター局所環 / Kervaire類 / Steenrod algebra / Kervaire class / characteristic class / surgery / transformation group / Kervaire不変量 / 手術理論 / Steenrod代数 / 特性類 / 手術 / 変換群 / knot / graph / metrizability / SIGMA-product / sequential fan / Ramsey's theorem / 距離化定理 / 位相空間論 / M_-3空間 / 正規 / 結び目 / グラフ / 距離化可能 / シグマ積 / 点列ファン / ラムゼイ / 種数 / 楕円的特異点 / 有理的特異点 / リース環 / ヒルベルト級数 / コーエン・マコーレー環 / 強混合型の確率変数 / リ-マン多様体の極点 / 三角形分割の生成定理 / 可微分レトラクト / 可微分写像芽の特異点 / Blow analytic写像 / 可微分写像芽 / 非線形Voltera型微分方程式 / 距離化可能性 / Arhangel'skiiの問題 / 情報容量の表現 / 退化したU-統計量 / 多重ウィナ-積分 / 弱従属確率変数列 Less
  • Research Projects

    (11 results)
  • Research Products

    (38 results)
  • Co-Researchers

    (17 People)
  •  Study on envelopesPrincipal Investigator

    • Principal Investigator
      西村 尚史
    • Project Period (FY)
      2023 – 2026
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Review Section
      Basic Section 11020:Geometry-related
    • Research Institution
      Yokohama National University
  •  New Development of Singularity TheoryPrincipal Investigator

    • Principal Investigator
      NISHIMURA Takashi
    • Project Period (FY)
      2017 – 2019
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Research Field
      Geometry
    • Research Institution
      Yokohama National University
  •  Geometric integration of crystal theory and vision theory by singularity theoryPrincipal Investigator

    • Principal Investigator
      NISHIMURA Takashi
    • Project Period (FY)
      2014 – 2015
    • Research Category
      Grant-in-Aid for Challenging Exploratory Research
    • Research Field
      Foundations of mathematics/Applied mathematics
    • Research Institution
      Yokohama National University
  •  Recognition Problem in Singularity Theory of Differentiable MappingsPrincipal Investigator

    • Principal Investigator
      NISHIMURA Takashi
    • Project Period (FY)
      2002 – 2003
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Research Field
      Geometry
    • Research Institution
      Yokohama National University
  •  Manifolds with Actions of Cyclic Groups

    • Principal Investigator
      KITADA Yasuhiko
    • Project Period (FY)
      1998 – 1999
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Research Field
      Geometry
    • Research Institution
      Yokohama National University
  •  Applications of Ramsey's theorem

    • Principal Investigator
      TAMANO Kenichi
    • Project Period (FY)
      1997 – 1998
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Research Field
      General mathematics (including Probability theory/Statistical mathematics)
    • Research Institution
      Yokohama National University
  •  高所環上のMCM加群とヒルベルト級数

    • Principal Investigator
      大石 彰
    • Project Period (FY)
      1995
    • Research Category
      Grant-in-Aid for General Scientific Research (C)
    • Research Field
      Algebra
    • Research Institution
      Yokohama National University
  •  局所環上のMCM加群とヒルベルト級数

    • Principal Investigator
      大石 彰
    • Project Period (FY)
      1994
    • Research Category
      Grant-in-Aid for General Scientific Research (C)
    • Research Field
      Algebra
    • Research Institution
      Yokohama National University
  •  局所環上のMCM加群とヒルベルト級数

    • Principal Investigator
      大石 彰
    • Project Period (FY)
      1993
    • Research Category
      Grant-in-Aid for General Scientific Research (C)
    • Research Field
      Algebra
    • Research Institution
      Yokohama National University
  •  可微分写像と特異点理論の研究

    • Principal Investigator
      吉永 悦男
    • Project Period (FY)
      1990
    • Research Category
      Grant-in-Aid for General Scientific Research (C)
    • Research Field
      解析学
    • Research Institution
      Yokohama National University
  •  極限定理とその周辺

    • Principal Investigator
      吉原 健一
    • Project Period (FY)
      1989
    • Research Category
      Grant-in-Aid for General Scientific Research (C)
    • Research Field
      General mathematics (including Probability theory/Statistical mathematics)
    • Research Institution
      Yokohama National University

All 2024 2023 2020 2019 2018 2017 2016 2015 2014 2002

All Journal Article Presentation Book

  • [Book] 特異点と分岐2002

    • Author(s)
      西村 尚史
    • Total Pages
      408
    • Publisher
      共立出版
    • Description
      「研究成果報告書概要(和文)」より
    • Data Source
      KAKENHI-PROJECT-14540069
  • [Book] Singularities and Bifurcations (in Japanese)2002

    • Author(s)
      Nishimura Takashi
    • Publisher
      Kyouritsu Shuppan
    • Description
      「研究成果報告書概要(欧文)」より
    • Data Source
      KAKENHI-PROJECT-14540069
  • [Journal Article] On envelopes created by circle families in the plane2024

    • Author(s)
      Takashi Nishimura
    • Journal Title

      MI Lecture Note

      Volume: 95 Pages: 323-331

    • Open Access
    • Data Source
      KAKENHI-PROJECT-23K03109
  • [Journal Article] Envelopes created by circle families in the plane2024

    • Author(s)
      Yongqiao Wang and Takashi Nishimura
    • Journal Title

      Journal of Geometry

      Volume: 115:7 Issue: 1 Pages: 1-20

    • DOI

      10.1007/s00022-023-00708-z

    • Peer Reviewed / Open Access / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-23K03109
  • [Journal Article] Anti-orthotomics of frontals and their applications2020

    • Author(s)
      Stanislaw Janeczko and Takashi Nishimura
    • Journal Title

      Journal of Mathematical Analysis and Applications

      Volume: 487 Issue: 2 Pages: 124019-124019

    • DOI

      10.1016/j.jmaa.2020.124019

    • Peer Reviewed / Open Access / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-17K05245
  • [Journal Article] Kato's chaos created by quadratic mappings associated with spherical orthotomic curves2020

    • Author(s)
      Takashi Nishimura
    • Journal Title

      Journal of Singularities

      Volume: 21 Pages: 205-211

    • DOI

      10.5427/jsing.2020.21l

    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-17K05245
  • [Journal Article] The spherical dual transform is an isometry for spherical Wulff shapes2019

    • Author(s)
      Huhe Han and Takashi Nishimura
    • Journal Title

      Studia Mathematica

      Volume: 245 Issue: 3 Pages: 201-211

    • DOI

      10.4064/sm8406-9-2016

    • Peer Reviewed / Open Access / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-17K05245
  • [Journal Article] Jacobian-squared function-germs2018

    • Author(s)
      Takashi Nishimura
    • Journal Title

      Pure and Applied Mathematics Quarterly

      Volume: 13 Issue: 4 Pages: 711-728

    • DOI

      10.4310/pamq.2017.v13.n4.a5

    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-17K05245
  • [Journal Article] Preservation of immersed or injective properties by composing generic generalized distance-squared mappings2018

    • Author(s)
      Shunsuke Ichiki and Takashi Nishimura
    • Journal Title

      Springer Proceedings in Mathematics & Statistids

      Volume: 222 Pages: 537-547

    • DOI

      10.1007/978-3-319-73639-6_18

    • ISBN
      9783319736389, 9783319736396
    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-17K05245
  • [Journal Article] Spherical method for studying Wulff shapes and related topics2018

    • Author(s)
      Huhe Han and Takashi Nishimura
    • Journal Title

      Advanced Studies in Pure Mathematics

      Volume: 78 Pages: 1-53

    • DOI

      10.2969/aspm/07810001

    • NAID

      120006539324

    • Peer Reviewed / Open Access / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-17K05245
  • [Journal Article] 可微分 convex integrand とその dual の同時安定性について2018

    • Author(s)
      西村 尚史
    • Journal Title

      RIMS kokyuroku

      Volume: 2085 Pages: 15-19

    • Open Access
    • Data Source
      KAKENHI-PROJECT-17K05245
  • [Journal Article] Lowerable vector fields for a finitely L-determined multigerm2018

    • Author(s)
      Yusuke Mizota and Takashi Nishimura
    • Journal Title

      Hokkaido Mathematical Journal

      Volume: 47 Issue: 1 Pages: 17-23

    • DOI

      10.14492/hokmj/1520928058

    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-17K05245
  • [Journal Article] Strictly convex Wulff shapes and C^1 convex integrands2017

    • Author(s)
      Huhe Han and Takashi Nishimura
    • Journal Title

      Proceedings of the American Mathematical Society

      Volume: 145 Issue: 9 Pages: 3997-4008

    • DOI

      10.1090/proc/13510

    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-17K05245
  • [Journal Article] STABILITY OF <i>C</i><b><sup>∞ </sup></b>CONVEX INTEGRANDS2017

    • Author(s)
      Erica Boizan Batista, Huhe Han and Takashi Nishimura
    • Journal Title

      Kyushu Journal of Mathematics

      Volume: 71 Issue: 1 Pages: 187-196

    • DOI

      10.2206/kyushujm.71.187

    • NAID

      130005666252

    • ISSN
      1340-6116, 1883-2032
    • Language
      English
    • Peer Reviewed / Open Access / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-17K05245
  • [Journal Article] Wulff shapes and their duals2017

    • Author(s)
      Huhe Han and Takashi Nishimura
    • Journal Title

      RIMS Kokyuroku

      Volume: 2049 Pages: 39-44

    • Open Access
    • Data Source
      KAKENHI-PROJECT-17K05245
  • [Journal Article] Self-dual Wulff shapes and spherical convex bodies of constant width π/22017

    • Author(s)
      Huhe Han and Takashi Nishimura
    • Journal Title

      Journal of the Mathematical Society of Japan

      Volume: 69 Issue: 4 Pages: 1475-1484

    • DOI

      10.2969/jmsj/06941475

    • NAID

      130006887107

    • ISSN
      0025-5645, 1881-1167, 1881-2333
    • Language
      English
    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-17K05245
  • [Journal Article] Aperture of Singularities2015

    • Author(s)
      Daisuke Kagatsume and Takashi Nishimura
    • Journal Title

      Journal of Singularities

      Volume: 12 Pages: 80-91

    • DOI

      10.5427/jsing.2015.12e

    • Peer Reviewed / Acknowledgement Compliant / Open Access
    • Data Source
      KAKENHI-PROJECT-26610035
  • [Presentation] On envelopes created by straight line families in the plane2024

    • Author(s)
      Takashi Nishimura
    • Organizer
      Singularity days at ICMC, University of Sao Paulo at Sao Carlos (Brazil)
    • Invited / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-23K03109
  • [Presentation] 平面内の円族が創造する包絡線について(Yongqiao Wang 氏との共同研究)2023

    • Author(s)
      西村尚史
    • Organizer
      研究集会【特異点論及びその周辺分野の深化と異分野への応用】
    • Data Source
      KAKENHI-PROJECT-23K03109
  • [Presentation] Problems related to creative conditions on envelopes2023

    • Author(s)
      西村尚史
    • Organizer
      RIMS 共同研究(公開型) 研究集会「特異点論の展開」
    • Data Source
      KAKENHI-PROJECT-23K03109
  • [Presentation] On envelopes created by straight line families in the plane2023

    • Author(s)
      Takashi Nishimura
    • Organizer
      WORKSHOP on Analytic and Algebraic Singularities 2023, Warsaw University of Technology (Poland)
    • Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-23K03109
  • [Presentation] On envelopes created by circle families in the plane (a joint work with Yongqiao Wang)2023

    • Author(s)
      Takashi Nishimura
    • Organizer
      WORKSHOP on Mathematics for Industry 2023, Warsaw University of Technology (Poland)
    • Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-23K03109
  • [Presentation] Jacobian-squared function-germs2019

    • Author(s)
      Takashi Nishimura
    • Organizer
      西北農林科技大学特別学術報告
    • Invited / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-17K05245
  • [Presentation] Anti-Orthotomics of Frontals2019

    • Author(s)
      Takashi Nishimura
    • Organizer
      トポロジープロジェクト研究集会【特異点論による空間研究】
    • Data Source
      KAKENHI-PROJECT-17K05245
  • [Presentation] Anti-Orthotomics of Frontals and their Applications2019

    • Author(s)
      Takashi Nishimura
    • Organizer
      6th International Workshop on Singularities in Generic Geometry and its Applications, Valencia University
    • Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-17K05245
  • [Presentation] Jacobian-squared function-germs2019

    • Author(s)
      Takashi Nishimura
    • Organizer
      Special Session on Real and Complex Singularities Spring Central and Western Joint Sectional Meeting, American Mathematical Society
    • Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-17K05245
  • [Presentation] Anti-Orthotomics of Frontals and their Applications2019

    • Author(s)
      Takashi Nishimura
    • Organizer
      SingularityTheory Group Seminar at Sao Paulo University
    • Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-17K05245
  • [Presentation] 2.Limit of the Hausdorff distance for one-parameter families of some Wulff shapes2018

    • Author(s)
      Takashi Nishimura
    • Organizer
      RIMS共同研究(公開型)【可微分写像の特異点論を用いたトポロジー・微分幾何学の研究】
    • Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-17K05245
  • [Presentation] Projections of S^n2018

    • Author(s)
      西村 尚史
    • Organizer
      研究集会【微分幾何学・微分式系・特異点論の応用】
    • Data Source
      KAKENHI-PROJECT-17K05245
  • [Presentation] Self-dual Wulff shapes and spherical convex bodies of constant width π/22017

    • Author(s)
      Takashi Nishimura
    • Organizer
      Banach Center Conference (Bedrewo, Poland)
    • Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-17K05245
  • [Presentation] Simultaneous stability of C^∞ convex integrands and their duals2017

    • Author(s)
      Takashi Nishimura
    • Organizer
      RIMS研究集会
    • Data Source
      KAKENHI-PROJECT-17K05245
  • [Presentation] Stability of C^∞ convex integrands2017

    • Author(s)
      Erica Boizan Batista, Huhe Han and Takashi Nishimura
    • Organizer
      日本数学会秋季総合分科会
    • Data Source
      KAKENHI-PROJECT-17K05245
  • [Presentation] Strictly convex Wulff shapes and C^1 convex integrands2016

    • Author(s)
      韓 呼和、西村尚史
    • Organizer
      日本数学会年会
    • Place of Presentation
      筑波大学
    • Year and Date
      2016-03-17
    • Data Source
      KAKENHI-PROJECT-26610035
  • [Presentation] The spherical dual transform is an isometry for spherical Wulff shapes2015

    • Author(s)
      韓 呼和、西村尚史
    • Organizer
      日本数学会秋季総合分科会
    • Place of Presentation
      京都産業大学
    • Year and Date
      2015-09-15
    • Data Source
      KAKENHI-PROJECT-26610035
  • [Presentation] Strictly convex Wulff shapes and C^1 convex integrands2015

    • Author(s)
      Takashi Nishimura
    • Organizer
      Geometric Singularity Theory
    • Place of Presentation
      バナッハセンター(ポーランド)
    • Year and Date
      2015-09-07
    • Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-26610035
  • [Presentation] Introduction to topological study of Wulff shapes2014

    • Author(s)
      Takashi Nishimura
    • Organizer
      Banach Center Conferences, CAS Workshop - Analytic and algebraic singularities
    • Place of Presentation
      バナッハセンター(ポーランド、ワルシャワ)
    • Year and Date
      2014-11-03
    • Invited
    • Data Source
      KAKENHI-PROJECT-26610035
  • [Presentation] Aperture of plane curves2014

    • Author(s)
      Takashi Nishimura
    • Organizer
      Workshop on Singularities, Geometry, Topology and Related Topics
    • Place of Presentation
      東北師範大学(中国、長春)
    • Year and Date
      2014-09-03
    • Invited
    • Data Source
      KAKENHI-PROJECT-26610035
  • [Presentation] Aperture of plane curves2014

    • Author(s)
      Takashi Nishimura
    • Organizer
      Banach Center Conferences, CAS Workshop - Analytic and algebraic singularities
    • Place of Presentation
      バナッハセンター(ポーランド、ワルシャワ)
    • Year and Date
      2014-11-03
    • Invited
    • Data Source
      KAKENHI-PROJECT-26610035
  • 1.  NEGAMI Seiya (40164652)
    # of Collaborated Projects: 4 results
    # of Collaborated Products: 0 results
  • 2.  前田 正男 (00016164)
    # of Collaborated Projects: 4 results
    # of Collaborated Products: 0 results
  • 3.  HIRANO Norimichi (80134815)
    # of Collaborated Projects: 3 results
    # of Collaborated Products: 0 results
  • 4.  TAMANO Kenichi (90171892)
    # of Collaborated Projects: 3 results
    # of Collaborated Products: 0 results
  • 5.  TERADA Toshiji (80126383)
    # of Collaborated Projects: 3 results
    # of Collaborated Products: 0 results
  • 6.  大石 彰 (60112166)
    # of Collaborated Projects: 3 results
    # of Collaborated Products: 0 results
  • 7.  秋葉 繁夫 (80017954)
    # of Collaborated Projects: 3 results
    # of Collaborated Products: 0 results
  • 8.  KITADA Yasuhiko (70016145)
    # of Collaborated Projects: 2 results
    # of Collaborated Products: 0 results
  • 9.  吉原 健一 (00017766)
    # of Collaborated Projects: 2 results
    # of Collaborated Products: 0 results
  • 10.  吉永 悦男 (70015949)
    # of Collaborated Projects: 2 results
    # of Collaborated Products: 0 results
  • 11.  HONDA Atsufumi (90708611)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 12.  NAGURA Maki (40251772)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 13.  高野 清治 (90018060)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 14.  馬場 裕 (10175549)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 15.  野間 淳 (90262401)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 16.  原下 秀士 (70396852)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 17.  HAN Huhe
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 2 results

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