Hirasawa Gou 平澤剛

… Alternative Names

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 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

Hirasawa Gou 平澤 剛

Hirasawa Go 平澤 剛

hirasawa go 平澤 剛

HIRASAWA Go 平澤 剛

Research Projects

Research Products

Co-Researchers

Research of invariant semiclosed subspacesPrincipal Investigator

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

Research on topological and geometrical structure of invariant subspace problem based on a choice functionPrincipal Investigator

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

Study on the well-posedness of hyperbolic equation with memory

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

Topological structures for semiclosed operators using de Branges space theoryPrincipal Investigator

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

Functional analytic research of hyperbolic equations with memory

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

Studies of solvability for hyperbolic Volterra equations

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

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

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Isometries and Maps Compatible with Inverted Jordan Triple Products on Groups,2012

Author(s)

Journal Title

DOI

Data Source

[Journal Article] The q-deformed normal operator and its corresponding contraction2010

Author(s)

Journal Title

Data Source

[Journal Article] The q-deformed normal operator and its corresponding contraction2010

Author(s)

Journal Title

Data Source

[Journal Article] Algebraic properties of the distance between Sobolev spaces2010

Author(s)

Journal Title

Data Source

[Journal Article] The q-deformed normal operator and its corresponding contraction2010

Author(s)

Journal Title

Data Source

[Journal Article] A topology for semiclosed operators in a Hilbert space2007

Author(s)

Journal Title

Description

Data Source

[Journal Article] A topology for semiclosed operators in a Hilbert space2007

Author(s)

Journal Title

Description

Data Source

[Presentation] 半閉作用素の弱共役性について2022

Hirasawa Gou 平澤剛

Hirasawa Go 平澤剛

hirasawa go 平澤剛

HIRASAWA Go 平澤剛