Itoh Takashi 伊藤隆

… Alternative Names

ITOH TAKASHI 伊藤隆

伊藤隆

ITOH Takashi 伊藤隆

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Researcher Number	40193495
Other IDs
Affiliation (Current)	2025: 群馬大学, 共同教育学部, 教授
Affiliation (based on the past Project Information) *help	2016 – 2018: 群馬大学, 教育学部, 教授 2013: 群馬大学, 教育学部, 教授 2004 – 2010: 群馬大学, 教育学部, 教授 2001 – 2003: 群馬大学, 教育学部, 助教授 1999: Gunma University, Faculty of Education, assistant professor, 教育学部, 助教授 … More 1996: 群馬大学, 医療技術短期大学部, 助教授 1991 – 1995: 群馬大学, 教育学部, 助教授 1987: 琉球大学, 理学部, 助手 Less
Review Section/Research Field	Principal Investigator Basic analysis Except Principal Investigator Algebra / 解析学 / Global analysis / Global analysis / 代数学・幾何学
Keywords	Principal Investigator 作用素空間 / 作用素環 / 数域半径 / 数域半径作用素空間 / 作用素論 / 関数解析 / ヒルベルト空間 / 完全有界写像 / Onerator Norm / Operator Algebra … More / Numerical Radius / Operator Space / 作用素ノルム / 完全正値 / 完全有界 / テープリッツ作用素 / 行列作用素システム / 完全正値性 / 完全有界性 / ノルム空間 … More Except Principal Investigator 作用素環 / 作用素空間 / 指標 / Haagerup tensor product / operator algebra / 完全有界写像 / 数域半径 / シュアー積 / 完全正写像 / 不足群 / ブロック / 表現 / 群環 / モジュラー表現 / 根基 / 有限群 / 単葉関数論 / 環 / numerical radius operator space / Schur multiplier / numerical radius / operator space / completely bounded map / completely positive map / 写像の分解 / 可換子表現 / モジュール写像 / シュア-積 / 数域作用素空間 / ハーゲラップテンソル積 / Operator space / irrational ratotion algebra / K-group / stable rank / real rank / c^-algebra / C^-環 / 作業素空間 / ハーゲラップ積 / 無理数回転環 / K-群 / 安定次元 / 実次元 / C-環 / 作業素環 / radical / group ring / defect / modular / block / representation / finite group / character / 超曲面(real) / CR-構造 / 複素多様体 / 単元生成 / 単調距離 / 量子状態空間 / ペッツ長谷川の関数 / 完全有界 / 完全正値 / 極大可換部分環 / Haagerup テンソル積 / Petz-Hasegawa の関数 / 作用素論 / 作用素の正値性 / Schur積 / Haagerupテンソル積 / Pick関数 / 作用素単調関数 / 基本サイクル / 極大イデアルサイクル / 正規2重点 / Yau系列 / 楕円系列 / 正規特異点 / 正規部分群 / 体 / 標数 / 巾零指数 / Nunokawa's lemma / argument theorems. / multivalent functions. / subordination. / Caratheodory functions. / gackのlemma / JackのLemma / convex function / Starlike function / 局所化 / ア-ベル圏 / 森田双対性 / 準フロベニウス環 / 中山予想 Less

Decomposition of Maps on Operator Algebras with Numerical RadiusPrincipal Investigator
- Principal Investigator
  
  ITOH TAKASHI
- Project Period (FY)
  2016 – 2018
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Basic analysis
- Research Institution
  Gunma University
Operator space and Its application
- Principal Investigator
  
  NAGISA Masaru
- Project Period (FY)
  2010 – 2013
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Global analysis
- Research Institution
  Chiba University
Embedding of ordered normed spaces into numerical radius operator spacesPrincipal Investigator
- Principal Investigator
  
  ITOH Takashi
- Project Period (FY)
  2008 – 2010
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Basic analysis
- Research Institution
  Gunma University
A Study of Embeddings of Normed Spaces into Numerical Radius Operator SpacesPrincipal Investigator
- Principal Investigator
  
  ITOH Takashi
- Project Period (FY)
  2006 – 2007
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Basic analysis
- Research Institution
  Gunma University
Related topics on Operator Theory and Operator Algebras
- Principal Investigator
  
  NAGISA Masaru
- Project Period (FY)
  2003 – 2005
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Global analysis
- Research Institution
  Chiba University
The geometric structure of operator algebras
- Principal Investigator
  
  MASARU Nagisa
- Project Period (FY)
  2000 – 2002
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Global analysis
- Research Institution
  Chiba University
Research on defect groups of blocks of a group ring
- Principal Investigator
  
  FUKUSHIMA Hiroshi
- Project Period (FY)
  1998 – 1999
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Algebra
- Research Institution
  Gunma University
二次元楕円型特異点の楕円系列について
- Principal Investigator
  
  都丸正
- Project Period (FY)
  1996
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Algebra
- Research Institution
  Gunma University
群環の表現論
- Principal Investigator
  
  福島博
- Project Period (FY)
  1995
- Research Category
  
  Grant-in-Aid for General Scientific Research (C)
- Research Field
  
  Algebra
- Research Institution
  Gunma University
群環の表現論
- Principal Investigator
  
  福島博
- Project Period (FY)
  1994
- Research Category
  
  Grant-in-Aid for General Scientific Research (C)
- Research Field
  
  Algebra
- Research Institution
  Gunma University
JackのLemmaの応用について
- Principal Investigator
  
  布川護
- Project Period (FY)
  1993
- Research Category
  
  Grant-in-Aid for General Scientific Research (C)
- Research Field
  
  解析学
- Research Institution
  Gunma University
多葉関数論の新しい展開について
- Principal Investigator
  
  布川護
- Project Period (FY)
  1992
- Research Category
  
  Grant-in-Aid for General Scientific Research (C)
- Research Field
  
  解析学
- Research Institution
  Gunma University
多元環の中山予想についての研究
- Principal Investigator
  
  OTAKE Koichiro
- Project Period (FY)
  1991
- Research Category
  
  Grant-in-Aid for General Scientific Research (C)
- Research Field
  
  代数学・幾何学
- Research Institution
  Gunma University
C, R, 構造の局所埋めこみ理論(アブストラクト〓bの局所可解性)
- Principal Investigator
  
  赤堀隆夫
- Project Period (FY)
  1987
- Research Category
  
  Grant-in-Aid for General Scientific Research (C)
- Research Field
  
  解析学
- Research Institution
  University of the Ryukyus

All 2014 2012 2010 2009 2007 2006 2004 Other

All Journal Article Presentation Book

[Book] π -πの計算アルキメデスから現代まで-2007
- Author(s)
  伊藤隆, 竹之内脩
- Total Pages
  178
- Publisher
  共立出版株式会社
- Data Source
  KAKENHI-PROJECT-18540159
[Book] π-πの計算アルキメデスから現代まで2007
- Author(s)
  竹之内脩伊藤隆
- Publisher
  共立出版株式会社
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-18540159
[Journal Article] On the extended Haagerup tensor product in Operator spaces2014
- Author(s)
  伊藤隆, 渚勝
- Journal Title
  
  J. of Korean Math. Soc.
  
  Volume: 51 Pages: 345-362
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-22540220
[Journal Article] Characterization of diagonality for operators2012
- Author(s)
  伊藤隆, 渚勝
- Journal Title
  
  Scientiae Math. Japon
  
  Volume: 75 Pages: 263-273
- NAID
  130007663399
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-22540220
[Journal Article] Characterization of diagonality for operators2012
- Author(s)
  伊藤　隆、渚　勝
- Journal Title
  
  Scientiae Mathematicae Japonicae
  
  Volume: 75
- NAID
  130007663399
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-22540220
[Journal Article] Characterization of maximal primitive ideals of Toeplitz algebras2010
- Author(s)
  Rizky Rosjanuardi, Takashi Itoh
- Journal Title
  
  Scientiae Mathematicae Japonicae 72
  
  Pages: 393-397
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20540156
[Journal Article] Characterization of maximal primitive ideals of Toeplitz algebras2010
- Author(s)
  伊藤隆, Rizky Rosjanuardi
- Journal Title
  
  Scientiae Mathematicae Japonicae
  
  Volume: Vol.72 Pages: 393-397
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20540156
[Journal Article] 長方形の面積の公式における「縦×横」の変遷と多様性について2009
- Author(s)
  伊藤隆
- Journal Title
  
  群馬大学教育学部紀要 57
  
  Pages: 5-14
- NAID
  120001269792
- Data Source
  KAKENHI-PROJECT-20540156
[Journal Article] π -Calculations of π from Archimedes until now2007
- Author(s)
  O. TAKENOUCHI and T. ITOH
- Journal Title
  
  Kyoritsu Syuppan
  
  Pages: 178-178
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-18540159
[Journal Article] Numerical radius norms on operator spaces2006
- Author(s)
  T. ITOH and M. NAGISA
- Journal Title
  
  J. London Math. Soc Vol. 74
  
  Pages: 154-166
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-18540159
[Journal Article] Numerical radius Haagerup norm and square factorization through Hilbert spaces2006
- Author(s)
  T.Itoh, M.Nagisa
- Journal Title
  
  J.Math.Soc.Japan vol.58, no.2
  
  Pages: 363-377
- NAID
  10018381245
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-15540198
[Journal Article] Numerical radius Haagerup norm and square Factorization through Hilbert spaces2006
- Author(s)
  T. ITOH and M. NAGISA
- Journal Title
  
  J. Math. Soc. Japan 52(2)
  
  Pages: 363-377
- NAID
  10018381245
- Description
  「研究成果報告書概要(和文)」より
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18540159
[Journal Article] Numerical Radius Norms on Operator Spaces2006
- Author(s)
  T.Itoh, M.Nagisa
- Journal Title
  
  J. London Math. Soc. 74(2)
  
  Pages: 154-166
- Data Source
  KAKENHI-PROJECT-18540159
[Journal Article] Numerical radius Haagerup norm and square factorization through Hibert spaces2006
- Author(s)
  T.Itoh, M.Nagisa
- Journal Title
  
  J. Mathematical Society Japan 58・2
  
  Pages: 363-377
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-15540198
[Journal Article] Numerical radius Haagerup norm and square factorization through Hilbert spaces2006
- Author(s)
  T. ITOH and M. NAGISA
- Journal Title
  
  J. Math. Soc. Japan Vol. 52
  
  Pages: 363-377
- NAID
  10018381245
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-18540159
[Journal Article] Numerical Radius-Norms on Operator Spaces2006
- Author(s)
  T. ITOH and M. NAGISA
- Journal Title
  
  J. London Math. Soc. 74(2)
  
  Pages: 154-166
- Description
  「研究成果報告書概要(和文)」より
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18540159
[Journal Article] Numerical radius norm for bounded module maps and Schur multipliers2004
- Author(s)
  T.Itoh, M.Nagisa
- Journal Title
  
  Acta Sci. Math(Szered) 70・1-2
  
  Pages: 195-211
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-15540198
[Journal Article] Numerical radius norm for bounded module maps and Schur multipliers2004
- Author(s)
  T.Itoh, M.Nagisa
- Journal Title
  
  Acta Science Mathematics (Szeged) 70
  
  Pages: 195-211
- Data Source
  KAKENHI-PROJECT-15540198
[Journal Article] Numerical radius norm for bounded module maps and Schur multipliers2004
- Author(s)
  T.Itoh, M.Nagisa
- Journal Title
  
  Acta Sci.Math.(Szeged) vol.70, no.1-2
  
  Pages: 195-211
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-15540198
[Journal Article] Numerical radius norms on operator spaces
- Author(s)
  T.Itoh, M.Nagisa
- Journal Title
  
  Journal of London Mathematical Society (To appear)
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-15540198
[Journal Article] Numerical radius norms on Operator spaces
- Author(s)
  T.Itoh, M.Nagisa
- Journal Title
  
  Journal of London Mathematical Society To appear
- Data Source
  KAKENHI-PROJECT-15540198
[Journal Article] Numerical radius Haagerup norm and square factorization.
- Author(s)
  T.Itoh, M.Nagisa
- Journal Title
  
  Journal of Mathematical Society of Japan To appear
- Data Source
  KAKENHI-PROJECT-15540198
[Journal Article] Numerical radius norms on operator spaces
- Author(s)
  T.Itoh, M.Nagisa
- Journal Title
  
  J. London Mathematical Society (掲載予定)
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-15540198
[Presentation] Haagerupテンソル積と拡張されたHaagerupテンソル積2012
- Author(s)
  伊藤隆, 渚勝
- Organizer
  作用素論作用素環論研究集会
- Place of Presentation
  大阪教育大学
- Year and Date
  2012-11-23
- Data Source
  KAKENHI-PROJECT-22540220
[Presentation] 作用素の対角性の特徴付け2012
- Author(s)
  伊藤隆, 渚勝
- Organizer
  日本数学会
- Place of Presentation
  九州大学
- Year and Date
  2012-09-24
- Data Source
  KAKENHI-PROJECT-22540220
[Presentation] Characterization of maximal primitive ideals of Toeplitz algebras2010
- Author(s)
  Rizky Rosjanuardi, Takashi Itoh
- Organizer
  日本数学会
- Place of Presentation
  名古屋大学東山キャンパス
- Year and Date
  2010-09-24
- Data Source
  KAKENHI-PROJECT-20540156
[Presentation] Characterization of maximal primitive ideals of Toeplitz algebras2010
- Author(s)
  伊藤隆, Rizky Rosjanuardi
- Organizer
  日本数学会
- Place of Presentation
  名古屋大学
- Year and Date
  2010-09-24
- Data Source
  KAKENHI-PROJECT-20540156
[Presentation] Effros-Ruan予想について2007
- Author(s)
  T. ITOH
- Organizer
  東京作用素環セミナー
- Place of Presentation
  SCS
- Year and Date
  2007-07-20
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-18540159
[Presentation] On Effros-Ruan Conjecture2007
- Author(s)
  T. ITOH
- Organizer
  Tokyo Operator Algebra Seminar
- Place of Presentation
  at SCS
- Year and Date
  2007-07-20
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-18540159

1. OTAKE Koichiro (60134269)

# of Collaborated Projects: 7 results

# of Collaborated Products: 0 results
2. NUNOKAWA Mamoru (00008137)

# of Collaborated Projects: 7 results

# of Collaborated Products: 0 results
3. FUKUSHIMA Hiroshi (30125869)

# of Collaborated Projects: 7 results

# of Collaborated Products: 0 results
4. NAGISA Masaru (50189172)

# of Collaborated Projects: 6 results

# of Collaborated Products: 19 results
5. 小関煕純 (80170257)

# of Collaborated Projects: 4 results

# of Collaborated Products: 0 results
6. MATUI Hiroki (40345012)

# of Collaborated Projects: 3 results

# of Collaborated Products: 0 results
7. ISHIMURA Ryuichi (10127970)

# of Collaborated Projects: 2 results

# of Collaborated Products: 0 results
8. 斎藤斉 (10042607)

# of Collaborated Projects: 2 results

# of Collaborated Products: 0 results
9. 西谷泉 (80261824)

# of Collaborated Projects: 2 results

# of Collaborated Products: 0 results
10. 都丸正 (70132579)

# of Collaborated Projects: 2 results

# of Collaborated Products: 0 results
11. NINOMIYA Yasushi (40092887)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
12. KODAKA Kazunori (30221964)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
13. WADA Shuhei (00249757)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
14. 武藤英男 (70008720)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
15. 瀬山士郎 (80008177)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
16. 赤堀隆夫 (40117560)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
17. 志賀博雄 (40128484)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
18. 西白保敏彦 (70044956)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
19. 石川弘 (70044980)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
20. 前原龍二 (40044987)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
21. 杉山健一 (90206441)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
22. 吉田英信 (60009280)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
23. 久我健一 (30186374)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
24. 宮本育子 (00009606)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results

Itoh Takashi 伊藤 隆

ITOH TAKASHI 伊藤 隆

伊藤 隆

ITOH Takashi 伊藤 隆

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Decomposition of Maps on Operator Algebras with Numerical RadiusPrincipal Investigator

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Embedding of ordered normed spaces into numerical radius operator spacesPrincipal Investigator

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A Study of Embeddings of Normed Spaces into Numerical Radius Operator SpacesPrincipal Investigator

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Itoh Takashi 伊藤隆

ITOH TAKASHI 伊藤隆

伊藤隆

ITOH Takashi 伊藤隆

[Book] π -πの計算アルキメデスから現代まで-2007

[Book] π-πの計算アルキメデスから現代まで2007