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Hirasawa Gou  平澤 剛

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Hirasawa Go  平澤 剛

hirasawa go  平澤 剛

HIRASAWA Go  平澤 剛

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Researcher Number 10434002
Other IDs
Affiliation (Current) 2025: 茨城大学, 応用理工学野, 教授
Affiliation (based on the past Project Information) *help 2020 – 2022: 茨城大学, 理工学研究科(工学野), 教授
2018: 茨城大学, 理工学研究科(工学野), 教授
2016 – 2017: 茨城大学, 工学部, 教授
2011 – 2014: 茨城大学, 工学部, 教授
2007 – 2010: Ibaraki University, College of Engineering, Associate Professor
Review Section/Research Field
Principal Investigator
Basic analysis / Basic Section 12010:Basic analysis-related
Except Principal Investigator
Basic analysis
Keywords
Principal Investigator
半閉部分空間 / 不変部分空間 / 極大鎖 / Boulbaki-Kneser の不動点定理 / Hausdorffの極大鎖定理 / Bourbaki-Kneserの不動点定理 / 半順序集合 / Uhlmannの補間的作用素平均族 / 不変な半閉部分空間 / 作用素幾何平均 … More / path / 線形次元 / 区間縮小法 / カラテオドリ条件 / 準線型発展方程式 / 強解 / 準線形発展方程式 / DeBranges空間 / 半閉作用素 … More
Except Principal Investigator
半閉作用素 / 半線形発展方程式 / Bergman空間 / 軟解 / Hardy空間 / ベルグマン空間 / 荷重合成作用素 / 解析関数空間 / リプシッツ作用素半群 / 準線形双曲型方程式 / nonlinear hyperbolic systems / dissiiativity condition / mild solutions / Cauchy problems / semierouos of locally Lipschitz operators / semilinear evolution equations / stability condition / finite difference approximations / 作用素平均 / 古田不等式 / Chernoffの積公式 / 非稠密な定義域をもつ作用素 / Stieltjes完全性 / conelike半群 / 作用素不等式 / 退化準線形双曲型方程式 / 準線形発展方程式 / 作用素幾何平均 / Bebiano-Lemos-Providencia不等式 / Grand Furuta不等式 / Hyers-Ulam-Rassias安定性 / 非線形双曲系 / 消散条件 / コーシー問題 / 局所リプシッツ作用素半群 / 安定性条件 / 有限差分近似 / べきコンパクト / 荷重付き合成作用素 / ボルテラ方程式 / 移流拡散方程式系 / 発展方程式 / DeBranges 空間 / Favard class / 合成作用素 / Volterra型積分作用素 / Fock型空間 / DeBranges空間 / quasilinear equation / Hyers-Ulam安定性 / Cauchy-Euler型作用素 / Bargmann-Fock空間 / integral solution / Bergman型空間 / チェザロ型積分作用素 / Fock型関数空間 / 積分型作用素 / 単位的半単純可換Banach環 / ソボレフ空間 / 積分作用素 / 有界正則関数空間 / q-距離 / ベルグマン・オーリッツ空間 / Bloch空間 / q-変形正規作用素 Less
  • Research Projects

    (6 results)
  • Research Products

    (25 results)
  • Co-Researchers

    (8 People)
  •  Research of invariant semiclosed subspacesPrincipal Investigator

    • Principal Investigator
      Hirasawa Go
    • Project Period (FY)
      2020 – 2022
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Review Section
      Basic Section 12010:Basic analysis-related
    • Research Institution
      Ibaraki University
  •  Research on topological and geometrical structure of invariant subspace problem based on a choice functionPrincipal Investigator

    • Principal Investigator
      hirasawa go
    • Project Period (FY)
      2016 – 2018
    • Research Category
      Grant-in-Aid for Challenging Exploratory Research
    • Research Field
      Basic analysis
    • Research Institution
      Ibaraki University
  •  Study on the well-posedness of hyperbolic equation with memory

    • Principal Investigator
      OKA Hirokazu
    • Project Period (FY)
      2012 – 2014
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Research Field
      Basic analysis
    • Research Institution
      Ibaraki University
  •  Topological structures for semiclosed operators using de Branges space theoryPrincipal Investigator

    • Principal Investigator
      HIRASAWA GO
    • Project Period (FY)
      2012 – 2014
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Research Field
      Basic analysis
    • Research Institution
      Ibaraki University
  •  Functional analytic research of hyperbolic equations with memory

    • Principal Investigator
      OKA Hirokazu
    • Project Period (FY)
      2008 – 2011
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Research Field
      Basic analysis
    • Research Institution
      Ibaraki University
  •  Studies of solvability for hyperbolic Volterra equations

    • Principal Investigator
      OKA Hirokazu
    • Project Period (FY)
      2005 – 2007
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Research Field
      Basic analysis
    • Research Institution
      Ibaraki University

All 2022 2019 2018 2016 2013 2012 2011 2010 2009 2007

All Journal Article Presentation

  • [Journal Article] A characterization of the stability of a system of the Banach space valued differential equations2013

    • Author(s)
      T. Miura, G. Hirasawa S.-E. Takahasi and T. Hayata
    • Journal Title

      Math. Inequal. Appl.

      Volume: 16 Issue: 3 Pages: 717-728

    • DOI

      10.7153/mia-16-54

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-23740097, KAKENHI-PROJECT-24540158, KAKENHI-PROJECT-24540160, KAKENHI-PROJECT-25400120
  • [Journal Article] Isometries and Maps Compatible with Inverted Jordan Triple Products on Groups,2012

    • Author(s)
      O.Hatori,G.Hirasawa,T.Miura,L.Molnar
    • Journal Title

      Tokyo Journal of Mathematics

      Volume: 35 Issue: 2 Pages: 385-410

    • DOI

      10.3836/tjm/1358951327

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-24540158, KAKENHI-PROJECT-24540160
  • [Journal Article] The q-deformed normal operator and its corresponding contraction2010

    • Author(s)
      Go Hirasawa
    • Journal Title

      Far East J.Math.Sci.

      Volume: 46 Pages: 101-106

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-20540154
  • [Journal Article] The q-deformed normal operator and its corresponding contraction2010

    • Author(s)
      平澤剛
    • Journal Title

      Far East J.Math.Sci. 46巻

      Pages: 101-106

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-20540154
  • [Journal Article] Algebraic properties of the distance between Sobolev spaces2010

    • Author(s)
      Go Hirasawa
    • Journal Title

      Int.J.Funct.Anal.Oper.Theory Appl.

      Volume: 2 Pages: 181-189

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-20540154
  • [Journal Article] The q-deformed normal operator and its corresponding contraction2010

    • Author(s)
      平澤剛
    • Journal Title

      Far East J . Math. Sci.

      Volume: 46 Pages: 101-106

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-20540154
  • [Journal Article] A topology for semiclosed operators in a Hilbert space2007

    • Author(s)
      Go, Hirasawa
    • Journal Title

      Acta Sci. Math. (Szeged) 73

      Pages: 271-271

    • Description
      「研究成果報告書概要(和文)」より
    • Data Source
      KAKENHI-PROJECT-17540143
  • [Journal Article] A topology for semiclosed operators in a Hilbert space2007

    • Author(s)
      Go Hirasawa
    • Journal Title

      Acta Sci. Math.(Szeged) 73

      Pages: 271-282

    • Description
      「研究成果報告書概要(欧文)」より
    • Data Source
      KAKENHI-PROJECT-17540143
  • [Presentation] 半閉作用素の弱共役性について2022

    • Author(s)
      平澤 剛
    • Organizer
      関数環研究集会
    • Data Source
      KAKENHI-PROJECT-20K03624
  • [Presentation] 不変な半閉部分空間の半順序集合について2022

    • Author(s)
      平澤 剛
    • Organizer
      京都大学数理解析研究所 RIMS共同研究(公開型)再生核ヒルベルト空間を中心とした実解析・複素解析・函数解析の総合的研究
    • Data Source
      KAKENHI-PROJECT-20K03624
  • [Presentation] Some problems for semiclosed subspaces in a Hilbert space2019

    • Author(s)
      平澤剛
    • Organizer
      RIMS 共同研究(公開型)
    • Data Source
      KAKENHI-PROJECT-16K13760
  • [Presentation] 半閉部分空間の path について2018

    • Author(s)
      平澤 剛
    • Organizer
      第5回日立解析学セミナー
    • Data Source
      KAKENHI-PROJECT-16K13760
  • [Presentation] 半閉部分空間の path について2018

    • Author(s)
      平澤 剛
    • Organizer
      第5回日立解析学セミナー
    • Data Source
      KAKENHI-PROJECT-16K13760
  • [Presentation] Another approach to a self-adjointness of operators with a Kato-Rellich potential2016

    • Author(s)
      平澤 剛
    • Organizer
      関数環研究集会
    • Place of Presentation
      茨城大学工学部小平記念会館
    • Year and Date
      2016-12-02
    • Data Source
      KAKENHI-PROJECT-16K13760
  • [Presentation] 代数的次元と不変部分空間について2013

    • Author(s)
      平澤 剛
    • Organizer
      富山解析セミナー2013
    • Place of Presentation
      富山大学
    • Data Source
      KAKENHI-PROJECT-24540158
  • [Presentation] 代数的次元と不変部分空間について2013

    • Author(s)
      平澤 剛
    • Organizer
      富山解析セミナー 2013
    • Place of Presentation
      富山大学理学部
    • Data Source
      KAKENHI-PROJECT-24540160
  • [Presentation] Lowner 関数による値域のある性質について2013

    • Author(s)
      平澤 剛
    • Organizer
      関数環研究集会
    • Place of Presentation
      クロスパルにいがた
    • Data Source
      KAKENHI-PROJECT-24540160
  • [Presentation] 半閉部分空間から閉部分空間へ2013

    • Author(s)
      平澤 剛
    • Organizer
      解析学セミナー
    • Place of Presentation
      新潟大学理学部
    • Data Source
      KAKENHI-PROJECT-24540158
  • [Presentation] Lowner 関数による値域のある性質について2013

    • Author(s)
      平澤 剛
    • Organizer
      関数環研究集会
    • Place of Presentation
      クロスパルにいがた
    • Data Source
      KAKENHI-PROJECT-24540158
  • [Presentation] 半閉部分空間から閉部分空間へ2013

    • Author(s)
      平澤剛
    • Organizer
      解析学セミナー
    • Place of Presentation
      新潟大学理学部
    • Data Source
      KAKENHI-PROJECT-24540160
  • [Presentation] ラプラシアンの摂動と距離について2012

    • Author(s)
      平澤 剛
    • Organizer
      富山解析セミナー
    • Place of Presentation
      富山大学理学部
    • Data Source
      KAKENHI-PROJECT-24540158
  • [Presentation] ラプラシアンの摂動と距離について2012

    • Author(s)
      平澤剛
    • Organizer
      富山解析セミナー
    • Place of Presentation
      富山大学理学部
    • Data Source
      KAKENHI-PROJECT-24540160
  • [Presentation] 自己共役作用素の半径の計算方法について2011

    • Author(s)
      平澤剛
    • Organizer
      関数環研究集会
    • Place of Presentation
      山形大学工学部
    • Year and Date
      2011-12-01
    • Data Source
      KAKENHI-PROJECT-20540154
  • [Presentation] Sobolev空間どうしの距離の代数的な性質について2009

    • Author(s)
      平澤剛
    • Organizer
      米沢数学セミナー
    • Place of Presentation
      山形大学工学部
    • Year and Date
      2009-07-07
    • Data Source
      KAKENHI-PROJECT-20540154
  • [Presentation] 対称作用素と自己共役作用素の位相的関係について2009

    • Author(s)
      平澤剛
    • Organizer
      関数環研究集会
    • Place of Presentation
      日本大学薬学部
    • Year and Date
      2009-11-26
    • Data Source
      KAKENHI-PROJECT-20540154
  • 1.  OKA Hirokazu (90257254)
    # of Collaborated Projects: 4 results
    # of Collaborated Products: 0 results
  • 2.  TANAKA Naoki (00207119)
    # of Collaborated Projects: 3 results
    # of Collaborated Products: 0 results
  • 3.  UEKI Seiichirou (70512408)
    # of Collaborated Projects: 2 results
    # of Collaborated Products: 0 results
  • 4.  HOSOKAWA Takuya (90553579)
    # of Collaborated Projects: 2 results
    # of Collaborated Products: 0 results
  • 5.  NAKAMOTO Ritsuo (80007799)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 6.  NISHIO Katsuyoshi (40001698)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 7.  SAKAKIBARA Nobuhisa (30235139)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 8.  三浦 毅
    # of Collaborated Projects: 0 results
    # of Collaborated Products: 1 results

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