Mitani Kenichi 三谷健一

… Alternative Names

三谷健一ミタニケンイチ

MITANI Ken-ichi 三谷健一

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Researcher Number	00468969
Other IDs
Affiliation (Current)	2025: 岡山県立大学, 情報工学部, 教授
Affiliation (based on the past Project Information) *help	2021 – 2023: 岡山県立大学, 情報工学部, 教授 2015 – 2021: 岡山県立大学, 情報工学部, 准教授 2011 – 2013: 岡山県立大学, 情報工学部, 准教授
Review Section/Research Field	Principal Investigator Basic Section 12010:Basic analysis-related Except Principal Investigator Basic analysis
Keywords	Principal Investigator ノルム不等式 / 幾何学的性質 / 幾何学的定数 / バナッハ空間 Except Principal Investigator James定数 / von Neumann-Jordan定数 / Radon空間 / Birkhoff直交 / バナッハ空間 / Banach space … More / geometric constant / Radon 空間 / Birkhoff 直交 / von Neumann Jordann 定数 / C^* algebra / symmetric point / symmtric point / Modified NJ 定数 / von Neumann Jordan 定数 / Isosceles orthogonality / Lassak's conjecture / Rotation invariant norm / Symmetric point / Radon space / Birkhoff orthogonality / NJ constant / James constant / Becknerの不等式 / π/2回転不変ノルム / absoluteノルム / 幾何学定数 / skew定数 / Dunkl-Williams定数 / ノルム空間 / 三角不等式 / Dunkl-Williams不等式 / von Neumann-Jordan 定数 / James 定数 / ノルム不等式 Less

バナッハ空間における単位球の幾何学的構造の研究とその応用Principal Investigator
- Principal Investigator
  
  三谷健一
- Project Period (FY)
  2021 – 2024
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Review Section
  
  Basic Section 12010:Basic analysis-related
- Research Institution
  Okayama Prefectural University
Geometric constants of Banach Spaces and their applications
- Principal Investigator
  
  Komuro Naoto
- Project Period (FY)
  2017 – 2021
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Basic analysis
- Research Institution
  Hokkaido University of Education
A study of geometric structure of Banach spaces and its applications
- Principal Investigator
  
  SAITO KICHI-SUKE
- Project Period (FY)
  2015 – 2018
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Basic analysis
- Research Institution
  Niigata University
Various constants and norm inequalities in Banach spaces and its applications
- Principal Investigator
  
  SAITO Kichisuke
- Project Period (FY)
  2011 – 2013
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Basic analysis
- Research Institution
  Niigata University

All 2023 2022 2021 2019 2018 2017 2016 2015 2014 2013 2012 2011 Other

All Journal Article Presentation

[Journal Article] Day-James空間のskewnessに関する最近の進展2023
- Author(s)
  三谷健一, 斎藤吉助, 小室直人
- Journal Title
  
  実解析学シンポジウム2022報告集
  
  Volume: - Pages: 36-41
- Data Source
  KAKENHI-PROJECT-21K03275
[Journal Article] Skewness of Banas-Fraczek space2023
- Author(s)
  Ken-Ichi Mitani
- Journal Title
  
  Linear and Nonlinear Analysis
  
  Volume: 9 Pages: 187-195
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21K03275
[Journal Article] バナッハ空間のskewnessと単位球のnon-square性について2023
- Author(s)
  三谷健一
- Journal Title
  
  日本大学経済学部研究紀要
  
  Volume: 98 Pages: 327-332
- Data Source
  KAKENHI-PROJECT-21K03275
[Journal Article] Banach空間のskewnessに関する最近の進展2023
- Author(s)
  三谷健一、斎藤吉助、小室直人
- Journal Title
  
  実解析学シンポジウム2023報告集
  
  Volume: 54 Pages: 40-44
- Data Source
  KAKENHI-PROJECT-21K03275
[Journal Article] On von Neumann-Jordan constant of generalized Banas-Fraczek spaces II2022
- Author(s)
  Ken-Ichi Mitani and Kichi-Suke Saito
- Journal Title
  
  Linear and Nonlinear Analysis
  
  Volume: 8 Pages: 217-223
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21K03275
[Journal Article] Skewness of Day-James spaces2022
- Author(s)
  Ken-Ichi Mitani, Kichi-Suke Saito and Naoto Komuro
- Journal Title
  
  Annals of Functional Analysis
  
  Volume: 13
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21K03275
[Journal Article] A note on relations between skewness and geometrical constants of Banach spaces2021
- Author(s)
  Ken-Ichi Mitani and Kichi-Suke Saito
- Journal Title
  
  Linear and Nonlinear Analysis
  
  Volume: 7 Pages: 257-264
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21K03275
[Journal Article] A note on relations between skewness and geometrical constants of Banach spaces2021
- Author(s)
  Ken-Ichi Mitani and Kichi-Suke Saito
- Journal Title
  
  Linear and Nonlinear Analysis
  
  Volume: 7(2) Pages: 257-264
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K05287
[Journal Article] Some results on skewness and geometrical constants of Banach spaces2021
- Author(s)
  三谷健一, 斎藤吉助
- Journal Title
  
  実解析学シンポジウム2021講演集
  
  Volume: - Pages: 44-48
- Open Access
- Data Source
  KAKENHI-PROJECT-21K03275
[Journal Article] Some results on skewness and geometrical constants of Banach spaces2021
- Author(s)
  三谷健一, 斎藤吉助
- Journal Title
  
  実解析学シンポジウム2021講演集
  
  Volume: - Pages: 44-48
- Open Access
- Data Source
  KAKENHI-PROJECT-17K05287
[Journal Article] 精密化された三角不等式の等号成立条件について2019
- Author(s)
  大和田智義、斎藤吉助、三谷健一
- Journal Title
  
  数理兼講究録
  
  Volume: 2143 Pages: 141-146
- Data Source
  KAKENHI-PROJECT-17K05287
[Journal Article] Geometrical constants of Day James spaces2019
- Author(s)
  三谷健一、斎藤吉助
- Journal Title
  
  数理兼講究録
  
  Volume: 2143 Pages: 147-153
- NAID
  120006888260
- Data Source
  KAKENHI-PROJECT-17K05287
[Journal Article] Von Neumann-Jordan constant of generalized Bana\'{s}-Fr\c{a}czek spaces2019
- Author(s)
  K.-I. Mitani, K.-S. Saito, Y. Takahashi
- Journal Title
  
  Proceedings of the 10th International Conference on Nonlinear Analysis and Convex Analysis
  
  Volume: special issue Pages: 227-232
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-17K05287
[Journal Article] von Neumann-Jordan constant of generalized Banach Fraczek spaces2018
- Author(s)
  Ken-Ichi Mitani, Yasuji Takahashi, Kichi-Suke Saito
- Journal Title
  
  J. Nonlinear Convex Analysis
  
  Volume: 19 Pages: 1705-1709
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-17K05287
[Journal Article] On von Neumann-Jordan constant of l_p-ｌ_q spaces2018
- Author(s)
  Ken-Ichi Mitani, Yasuji Takahashi, Kichi-Suke Saito
- Journal Title
  
  J. Nonlinear Convex Anal.
  
  Volume: 19 Pages: 1705-1709
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-15K04920
[Journal Article] Von Neumann-Jordan constant of generalized Banas-Fraczek spaces2018
- Author(s)
  三谷健一, 斎藤吉助, 高橋泰嗣
- Journal Title
  
  数理研講究禄
  
  Volume: 2095 Pages: 198-202
- Open Access
- Data Source
  KAKENHI-PROJECT-15K04920
[Journal Article] 2次元ローレンツ空間のJames定数についての最近の発展2017
- Author(s)
  斎藤吉助, 田中亮太朗, 三谷健一
- Journal Title
  
  数理研講究禄
  
  Volume: 2041 Pages: 77-83
- Data Source
  KAKENHI-PROJECT-15K04920
[Journal Article] Geometric constants of π/2-rotation invariant norms on R^22017
- Author(s)
  Yukino Tomizawa, Ken-Ichi Mitani, Kichi-Suke Saito, Ryotaro Tanaka
- Journal Title
  
  Ann Funct. Anal.
  
  Volume: 8 Pages: 215-230
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-15K04920
[Journal Article] Geometric constants of π/2-rotation invariant norms on R^22017
- Author(s)
  Yukino Tomizawa, Ken-Ichi Mitani, Kichi-Suke Saito, Ryotaro Tanaka
- Journal Title
  
  Ann. Funct. Anal.
  
  Volume: 8 Pages: 215-230
- Peer Reviewed / Acknowledgement Compliant
- Data Source
  KAKENHI-PROJECT-15K04920
[Journal Article] Geometric constants of π/2-rotaion invariant norms on R^22017
- Author(s)
  Yukino Tomizawa, Ken-Ichi Mitani, Kichi-Suke Saito, Ryotaro Tanaka
- Journal Title
  
  Annals of Functional Analysis
  
  Volume: 8 Issue: 2 Pages: 215-230
- DOI
  10.1215/20088752-0000007x
- Peer Reviewed / Acknowledgement Compliant / Open Access
- Data Source
  KAKENHI-PROJECT-16J01162, KAKENHI-PROJECT-16K05212, KAKENHI-PROJECT-17K05287
[Journal Article] A Comparison Between James and von Neumann-Jordan Constants2017
- Author(s)
  Komuro Naoto, Mitani Ken-Ichi, Saito Kichi-Suke, Tanaka Ryotaro, Tomizawa Yukino
- Journal Title
  
  Mediterranean Journal of Mathematics
  
  Volume: 14 Issue: 4 Pages: 1-13
- DOI
  10.1007/s00009-017-0968-9
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-16K05212, KAKENHI-PROJECT-17K05287, KAKENHI-PROJECT-16J01162
[Journal Article] Von Neumann-Jordan constant of l_p-l_q2017
- Author(s)
  三谷健一, 斎藤吉助, 高橋泰嗣
- Journal Title
  
  数理研講究禄
  
  Volume: 2033 Pages: 101-105
- Data Source
  KAKENHI-PROJECT-15K04920
[Journal Article] A comparison between James and von Neumann-Jordan constants2017
- Author(s)
  Naoto Komuro,Ken-Ichi Mitani, Kichi-Suke Saito, Ryotaro Tanaka, Yukino Tomizawa
- Journal Title
  
  Mediterr. J. Math.
  
  Volume: 14
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-15K04920
[Journal Article] Dual of extremal absolute norms on R^2 and the James constant2016
- Author(s)
  Masahiro Sato, Naoto Komuro, Ken-ichi Mitani, Kichi-Suke Saito, Ryotaro Tanaka
- Journal Title
  
  Banach J. Math. Anal.
  
  Volume: 10 Pages: 251-266
- Peer Reviewed / Acknowledgement Compliant
- Data Source
  KAKENHI-PROJECT-15K04920
[Journal Article] On the von Neumann-Jordan constant of generalied Banas-Fraczek spaces2016
- Author(s)
  Ken-Ichi Mitani, Yasuji Takahashi, Kichi-Suke Saito
- Journal Title
  
  Linear and Nonlinear Analysis
  
  Volume: 2 Pages: 311-316
- Peer Reviewed / Acknowledgement Compliant / Open Access
- Data Source
  KAKENHI-PROJECT-15K04920
[Journal Article] Note on Dunkl-Williams inequality with n elements2016
- Author(s)
  Ken-Ichi Mitani, Noriyuki Tabiraki, Tomoyoshi Ohwada
- Journal Title
  
  Nihonkai Mathematical Journal
  
  Volume: 27 Pages: 125-133
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-15K04920
[Journal Article] Dual of extremal absolute norms on R^2 and the James constant2016
- Author(s)
  Masahiro Sato, Naoto Komuro, Ken-Ichi Mitani, Kichi-Suke Saito, Ryotaro Tanaka
- Journal Title
  
  Banach J. Math. Anal.
  
  Volume: 10 Pages: 251-266
- Peer Reviewed / Acknowledgement Compliant / Open Access
- Data Source
  KAKENHI-PROJECT-15K04920
[Journal Article] Skewness of absolute normalized norms on R^22015
- Author(s)
  Ken-ichi Mitani, Kichi-Suke Saito, Naoto Komuro
- Journal Title
  
  Proc. 8th International Conference on Nonlinear Analysis and Convex Analysis
  
  Volume: --- Pages: 361-367
- Peer Reviewed / Acknowledgement Compliant
- Data Source
  KAKENHI-PROJECT-15K04920
[Journal Article] Geometric characterizations of Banach spaces using ψ-direct sums2015
- Author(s)
  Ken-ichi Mitani, Kichi-Suke Saito
- Journal Title
  
  Proc. 8th International Conference on Nonlinear Analysis and Convex Analysis
  
  Volume: --- Pages: 351-359
- Peer Reviewed / Acknowledgement Compliant
- Data Source
  KAKENHI-PROJECT-15K04920
[Journal Article] Convex property of James and von Neumann-Jordan constant of absolute norms on R^22015
- Author(s)
  Naoto Komuro, Kichi-Suke Saito, Ken-ichi Mitani
- Journal Title
  
  Proc. 8th International Conference on Nonlinear Analysis and Convex Analysis
  
  Volume: --- Pages: 301-308
- Peer Reviewed / Acknowledgement Compliant
- Data Source
  KAKENHI-PROJECT-15K04920
[Journal Article] Extremal structure of absolute normalized norms and the skewness2015
- Author(s)
  Ken-ichi Mitani, Kichi-Suke Saito, Naoto Komuro
- Journal Title
  
  Linear and Nonlinear Analysis
  
  Volume: 1 Pages: 159-167
- Peer Reviewed / Acknowledgement Compliant
- Data Source
  KAKENHI-PROJECT-15K04920
[Journal Article] On the convexity of von Neumann-Jordan constant2015
- Author(s)
  Naoto Komuro, Kichi-Suke Saito, Ken-ichi Mitani, Ryotaro Tanaka
- Journal Title
  
  J. Nonlinear Convex Analysis
  
  Volume: 16 Pages: 2263-2277
- Peer Reviewed / Acknowledgement Compliant
- Data Source
  KAKENHI-PROJECT-15K04920
[Journal Article] On James constants of two dimensional Lorentz sequence spaces and its dual2015
- Author(s)
  Ken-Ichi Mitani, Kichi-Suke Saito, Ryotaro Tanaka
- Journal Title
  
  J. Nonlinear Convex Analysis
  
  Volume: 16 Pages: 2269-2277
- Peer Reviewed / Acknowledgement Compliant
- Data Source
  KAKENHI-PROJECT-15K04920
[Journal Article] Another approach to characterizations of generalized triangle inequalities in normed spaces2014
- Author(s)
  Tamotsu Izumida, Ken-Ichi Mitani, Kichi-Suke Saito
- Journal Title
  
  Central European Jornal of Mathematics
  
  Volume: 未定
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23540189
[Journal Article] How to calculate James constants of Banach spaces2014
- Author(s)
  Kichi-Suke Saito, Naoto Komuro, Ken-ichi Mitani
- Journal Title
  
  Banach and Function Spaces
  
  Volume: IV Pages: 211-224
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23540189
[Journal Article] On skewness and geometrical constants of Banach spaces2014
- Author(s)
  Ken-Ichi Mitani, Kichi-Suke Saito and Yasuji Takahashi
- Journal Title
  
  Proceedings of the Fourth International Symposium on Banach and Function Spaces 2012
  
  Pages: 337-341
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23540189
[Journal Article] How to calculate James constants of Banach spaces2014
- Author(s)
  Kichi-Suke Saito, Naoto Komuro and Ken-ichi Mitani
- Journal Title
  
  Proceedings of the Fourth International Symposium on Banach and Function Spaces IV
  
  Pages: 211-224
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23540189
[Journal Article] On skewness and geometrical constants of Banach spaces2014
- Author(s)
  Ken-Ichi Mitani, Kichi-Suke Saito, Yasuji Takahashi
- Journal Title
  
  Banach and Function Spaces
  
  Volume: IV Pages: 337-341
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23540189
[Journal Article] Characterization of the intermediate values of the triangle inequality II2014
- Author(s)
  Hiroshi Sano, Tamotsu Izumida, Ken-Ichi Mitani, Tomoyoshi Ohwada, Kichi-Suke Saito
- Journal Title
  
  Cent. Eur. J. Math.
  
  Volume: 12 Pages: 778-786
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23540189
[Journal Article] Characterization of the intermediate values of the triangle inequality II2014
- Author(s)
  Hiroshi Sano, Tamotsu Izumida, Ken-Ichi Mitani, Tomoyoshi Ohwada and Kichi-Suke Saito
- Journal Title
  
  Cent. Eur. J. Math
  
  Volume: 12, no.5 Pages: 778-786
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23540189
[Journal Article] A note on extreme norms on R^22013
- Author(s)
  Kichi-Suke Saito, Ken-ichi Mitani and Naoto Komuro
- Journal Title
  
  Hokkaido Math. J
  
  Volume: 42 Pages: 1-9
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23540189
[Journal Article] Skewness and geometrical constant of Banach spaces2013
- Author(s)
  Ken-ichi Mitani, Kichi-Suke Saito and Yasuji Takahashi
- Journal Title
  
  Proceedings of the 7th International Conference on Nonlinear Analysis and Convex Analysis II
  
  Pages: 23-27
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23540189
[Journal Article] How to calculate James constants of Banach spaces2013
- Author(s)
  Kichi-Suke Saito, Naoto Komuro, Ken-ichi Mitani
- Journal Title
  
  Banach and Function Spaces
  
  Volume: IV
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23540189
[Journal Article] On skewness and geometrical constants of Banach spaces2013
- Author(s)
  Ken-Ichi Mitani, Kichi-Suke Saito, Yasuji Takahashi
- Journal Title
  
  Banach and Function Spaces
  
  Volume: IV
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23540189
[Journal Article] A note on extreme norms on R^22013
- Author(s)
  Kichi-Suke Saito, Ken-ichi Mitani, Naoto Komuro
- Journal Title
  
  Hokkaido Math. J.
  
  Volume: 42 Pages: 1-9
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23540189
[Journal Article] Skewness and geometrical constant of Banach spaces2013
- Author(s)
  Ken-ichi Mitani, Kichi-Suke Saito, Yasuji Takahashi
- Journal Title
  
  Proceedings of the 7th International Conference on Nonlinear Analysis and Convex Analysis
  
  Volume: II Pages: 23-27
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23540189
[Journal Article] Skewness and James constant of Banach spaces2013
- Author(s)
  Ken-ichi Mitani, Kichi-Suke Saito, Yasuji Takahashi
- Journal Title
  
  J. Nonlinear and Convex Analysis
  
  Volume: 14 Pages: 115-122
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23540189
[Journal Article] On the James constant of extreme absolute norms on R^2 and their dual norms2013
- Author(s)
  Naoto Komuro, Kichi-Suke Saito and Ken-ichi Mitani
- Journal Title
  
  Proceedings of the 7th International Conference on Nonlinear Analysis and Convex Analysis I
  
  Pages: 255-268
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23540189
[Journal Article] Skewness and James constant of Banach spaces2013
- Author(s)
  Ken-ichi Mitani, Kichi-Suke Saito and Yasuji Takahashi
- Journal Title
  
  J. Nonlinear and Convex Analysis
  
  Volume: 14, No.1 Pages: 115-122
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23540189
[Journal Article] On the James constant of extreme absolute norms on R^2 and their dual norms2013
- Author(s)
  Naoto Komuro, Kichi-Suke Saito, Ken-ichi Mitani
- Journal Title
  
  Proceedings of the 7th International Conference on Nonlinear Analysis and Convex Analysis
  
  Volume: I Pages: 255-268
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23540189
[Journal Article] U-convexity of ψ-direct sums of Banach spaces2011
- Author(s)
  Ken-ichi Mitani
- Journal Title
  
  J. Nonlinear Conv. Anal.
  
  Volume: 11巻 Pages: 199-213
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23540189
[Journal Article] On sharp triangle inequalities in Banach spaces and its application2011
- Author(s)
  Ken-Ichi Mitani
- Journal Title
  
  Proceedings of the 3rd International Symposium on Banach and Function spaces
  
  Volume: - Pages: 295-304
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23540189
[Journal Article] The monotonicity of absolute normalized norms on C^n2011
- Author(s)
  Ken-Ichi Mitani
- Journal Title
  
  Nihonkai Math. J.
  
  Volume: 22巻 Pages: 91-102
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23540189
[Journal Article] Extremal structure of the set of absolute normalized norms on R^2 and the James constant2011
- Author(s)
  Naoto Komuro, Kichi-Suke Saito and Ken-ichi Mitani
- Journal Title
  
  Applied Math. Computation
  
  Volume: 217 Pages: 10035-10048
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23540189
[Journal Article] On sharp triangle inequalities in Banach spaces and its application2011
- Author(s)
  Kichi-Suke Saito and Ken-Ichi Mitani
- Journal Title
  
  Banach and Function Spaces III
  
  Pages: 295-304
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23540189
[Journal Article] Another aspect of triangle inequality2011
- Author(s)
  Kichi-Suke Saito, Runling An, Hiroyoshi Mizuguchi and Ken-ichi Mitani
- Journal Title
  
  ISRN Mathematical Analysis
  
  Volume: Volume 2011 Pages: 5-5
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23540189
[Journal Article] Extremal structure of absolute normalized norms on R^2 III2011
- Author(s)
  Naoto Komuro, Kichi-Suke Saito and Ken-ichi Mitani
- Journal Title
  
  Banach and Function Spaces III
  
  Pages: 271-279
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23540189
[Journal Article] The monotonicity of absolute normalized norms on C^n2011
- Author(s)
  Ken-ichi Mitani, Kichi-Suke Saito and Naoto Komuro
- Journal Title
  
  Nihonkai Math. J
  
  Volume: 22, no. 2 Pages: 91-102
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23540189
[Journal Article] Another approach to characterizations of generalized triangle inequalities in normed spaces
- Author(s)
  Tamotsu Izumida, Ken-Ichi Mitani and Kichi-Suke Saito
- Journal Title
  
  CentralEuropean Jornal of Mathematics
  
  Volume: (掲載決定)
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-23540189
[Presentation] Banach 空間のskewnessに関する最近の進展2023
- Author(s)
  三谷健一
- Organizer
  実解析学シンポジウム2023
- Data Source
  KAKENHI-PROJECT-21K03275
[Presentation] Geometrical constants of 2-dimensional spaces with extreme norms in AN22023
- Author(s)
  小室直人, 三谷健一, 岡崎知之
- Organizer
  RIMS 共同研究 (公開型) 関数空間論とその周辺
- Data Source
  KAKENHI-PROJECT-21K03275
[Presentation] On skewness and geometrical constants of Banach spaces2023
- Author(s)
  三谷健一, 斎藤吉助, 小室直人
- Organizer
  RIMS 共同研究 (公開型) 関数空間論とその周辺
- Data Source
  KAKENHI-PROJECT-21K03275
[Presentation] Day-James空間のskewnessに関する最近の進展2022
- Author(s)
  三谷健一
- Organizer
  実解析学シンポジウム 2022
- Data Source
  KAKENHI-PROJECT-21K03275
[Presentation] バナッハ空間のskewnessに関する最近の進展について2022
- Author(s)
  三谷健一, 斎藤吉助
- Organizer
  日本数学会2022年度年会
- Data Source
  KAKENHI-PROJECT-21K03275
[Presentation] バナッハ空間のskewnessに関する最近の進展について2022
- Author(s)
  三谷健一, 斎藤吉助
- Organizer
  日本数学会2022年度年会
- Data Source
  KAKENHI-PROJECT-17K05287
[Presentation] Some results on skewness and geometrical constants of Banach spaces2021
- Author(s)
  三谷健一, 斎藤吉助
- Organizer
  実解析学シンポジウム2021
- Data Source
  KAKENHI-PROJECT-21K03275
[Presentation] Some results on skewness and geometrical constants of Banach spaces2021
- Author(s)
  三谷健一, 斎藤吉助
- Organizer
  実解析学シンポジウム2021
- Data Source
  KAKENHI-PROJECT-17K05287
[Presentation] バナッハ空間の幾何学的定数2021
- Author(s)
  三谷健一
- Organizer
  日本数学会
- Invited
- Data Source
  KAKENHI-PROJECT-17K05287
[Presentation] Day-Jameskuukannにおける幾何学的定数について2019
- Author(s)
  三谷健一、斎藤吉助
- Organizer
  実解析シンポジウム２０１９
- Data Source
  KAKENHI-PROJECT-17K05287
[Presentation] 精密化された三角不等式の等号成立条件について2018
- Author(s)
  大和田智義, 斎藤吉助, 三谷健一、
- Organizer
  数理解析研究所研究集会
- Data Source
  KAKENHI-PROJECT-15K04920
[Presentation] Geometrical constants of Day-Lames spaces2018
- Author(s)
  三谷健一、　斎藤吉助
- Organizer
  数理解析研究所研究集会
- Data Source
  KAKENHI-PROJECT-17K05287
[Presentation] Von Neumann-Jordan constant of generalized Banach-Fraczek spaces2018
- Author(s)
  三谷健一、斎藤吉助、高橋泰嗣
- Organizer
  京都大学数理解析研究所研究集会
- Data Source
  KAKENHI-PROJECT-17K05287
[Presentation] Von Neumann-Jordan constant of generalized Banas-Fraczek spaces2018
- Author(s)
  三谷健一, 斎藤吉助,高橋泰嗣
- Organizer
  京都大学数理解析研究所研究集会
- Data Source
  KAKENHI-PROJECT-15K04920
[Presentation] Geometrical constants of Day-James spaces2018
- Author(s)
  三谷健一, 斎藤吉助,
- Organizer
  数理解析研究所研究集会
- Data Source
  KAKENHI-PROJECT-15K04920
[Presentation] 精密化された三角不等式の等号成立条件について2018
- Author(s)
  大和田智義、　斎藤吉助、　三谷健一
- Organizer
  数理解析研究所研究集会
- Data Source
  KAKENHI-PROJECT-17K05287
[Presentation] Some results on James type constant of a Banach space2017
- Author(s)
  高橋泰嗣、加藤幹雄、三谷健一
- Organizer
  京都大学数理解析研究所研究集会
- Place of Presentation
  京都大学数理解析研究所(京都府・京都市)
- Year and Date
  2017-02-06
- Data Source
  KAKENHI-PROJECT-15K04920
[Presentation] ２次元ローレンツ空間のJames 定数についての最近の発展2017
- Author(s)
  斎藤吉助, 田中亮太朗, 三谷健一
- Organizer
  京都大学数理解析研究所研究集会
- Place of Presentation
  京都大学数理解析研究所(京都府・京都市)
- Year and Date
  2017-02-06
- Data Source
  KAKENHI-PROJECT-15K04920
[Presentation] von Neumann-Jordan constant of l_p-l_q spaces2017
- Author(s)
  三谷健一, 斎藤吉助,
- Organizer
  京都大学数理解析研究所研究集会
- Place of Presentation
  京都大学数理解析研究所(京都府・京都市)
- Year and Date
  2017-02-06
- Data Source
  KAKENHI-PROJECT-15K04920
[Presentation] Dunkl-Williams 不等式の一般化について2017
- Author(s)
  田開伯幸、三谷健一、大和田智義
- Organizer
  京都大学数理解析研究所研究集会
- Place of Presentation
  京都大学数理解析研究所(京都府・京都市)
- Year and Date
  2017-02-06
- Data Source
  KAKENHI-PROJECT-15K04920
[Presentation] 回転不変ノルムによる幾何学的定数2017
- Author(s)
  冨澤佑季乃、三谷健一、斎藤吉助，田中亮太朗
- Organizer
  日本数学会年会
- Place of Presentation
  首都大学東京(東京都・八王子市)
- Year and Date
  2017-03-24
- Data Source
  KAKENHI-PROJECT-15K04920
[Presentation] On the von Neumann-Jordan constant of generalized Banach-Fraczek spaces II2017
- Author(s)
  Ken-Ichi Mitani, Kichi-Suke Saito, and Yasuji Takahashi
- Organizer
  Nonlineia Analysis and Convex Analysis 2017
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K05287
[Presentation] On the von Neumann-Jordan constant of generalized Banach-Fraczek spaces II2017
- Author(s)
  Ken-Ichi Mitani, Kichi-Suke Saito, Yasuji Takahashi
- Organizer
  NonlinearAnalysis and Convex Analysis 2017
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-15K04920
[Presentation] On the von Neumann-Jordan constant of l^p-l^q spaces2016
- Author(s)
  Ken-Ichi Mitani, Yasuji Takahashi, Kichi-Suke Saito
- Organizer
  Nao-Asia 2016
- Place of Presentation
  Toki Messe(新潟県・新潟市)
- Year and Date
  2016-08-01
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-15K04920
[Presentation] Geometric constants of π/2-rotation invariant norms2016
- Author(s)
  Yukino Tomizawa, Ken-Ichi Mitani, Kichi-Suke Saito、Ryotaro Tanaka
- Organizer
  Nao-Asia 2016
- Place of Presentation
  Toki Messe(新潟県・新潟市)
- Year and Date
  2016-08-01
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-15K04920
[Presentation] On the von Neumann-Jordan constant of Banas-Fraaczek space2016
- Author(s)
  三谷健一, 斎藤吉助, 高橋泰嗣
- Organizer
  日本数学会秋期分科会
- Place of Presentation
  関西大学(大阪府・吹田市）
- Year and Date
  2016-09-15
- Data Source
  KAKENHI-PROJECT-15K04920
[Presentation] On the von Neumann-Jordan constant for Bana´s-Fraczek space2015
- Author(s)
  Ken-Ichi Mitani, Yasuji Takahashi, Kichi-Suke Saito
- Organizer
  The Fifth International Symposium on Banach and Function Spaces 2015
- Place of Presentation
  九州工業大学工学部、福岡県北九州市
- Year and Date
  2015-09-02
- Data Source
  KAKENHI-PROJECT-15K04920
[Presentation] 2 次元 Lorentz 数列空間及びその双対空間の James 定数2014
- Author(s)
  Ken-ichi Mitani , Kichi-Suke Saito and Ryotaro Tanaka
- Organizer
  日本数学会年会
- Year and Date
  2014-03-18
- Data Source
  KAKENHI-PROJECT-23540189
[Presentation] Recent development of James constant of two dimensional Lorentz sequence spaces2014
- Author(s)
  Kichi-Suke Saito, Ken-ichi Mitani and Ryotaro Tanaka
- Organizer
  RIMS 研究集会
- Place of Presentation
  京都大学
- Year and Date
  2014-01-08
- Data Source
  KAKENHI-PROJECT-23540189
[Presentation] Convex properties of James and von Neumann-Jordan constant of absolute norms on R^22013
- Author(s)
  Naoto Komuro, Kichi-Suke Saito and Ken-Ichi Mitani
- Organizer
  The Eighth International Conference on Nonlinear Analysis and Convex Analysis (NACA2013)
- Place of Presentation
  Hirosaki, Japan
- Year and Date
  2013-08-04
- Data Source
  KAKENHI-PROJECT-23540189
[Presentation] 三角不等式の一般化について2013
- Author(s)
  泉田保, 斎藤吉助, 三谷健一
- Organizer
  京都大学数理解析研究所研究集会
- Year and Date
  2013-11-07
- Data Source
  KAKENHI-PROJECT-23540189
[Presentation] von Neumann-Jordan 定数の凸性について2012
- Author(s)
  斎藤吉助, 小室直人, 三谷健一, 田中亮太朗
- Organizer
  日本数学会年会
- Place of Presentation
  東京理科大学神楽坂キャンパス
- Year and Date
  2012-03-29
- Data Source
  KAKENHI-PROJECT-23540189
[Presentation] On the James constant of extrem absolute norms on R^2 and their dual norms2011
- Author(s)
  Naoto Komuro, Kichi-Suke Saito and Ken-Ichi Mitani
- Organizer
  The seventh International Conference on Nonlinear Analysis and Convex Analysis
- Place of Presentation
  Pukyong National University, Busan Korea
- Year and Date
  2011-08-03
- Invited
- Data Source
  KAKENHI-PROJECT-23540189
[Presentation] バナッハ空間の skew 定数について2011
- Author(s)
  三谷健一, 斎藤吉助, 高橋泰嗣
- Organizer
  京都大学数理解析研究所
- Year and Date
  2011-08-30
- Data Source
  KAKENHI-PROJECT-23540189
[Presentation] バナッハ空間のskewnessについて2011
- Author(s)
  三谷健一
- Organizer
  京都大学数理解析研究所研究集会
- Place of Presentation
  京都大学数理解析研究所
- Data Source
  KAKENHI-PROJECT-23540189
[Presentation] Skew and geometrical constants of a Banach space2011
- Author(s)
  Ken-ichi Mitani, Kichi-Suke Saito, Yasuji Takahashi
- Organizer
  The seventh International Conference on Nonlinear Analysis and Convex Analysis
- Place of Presentation
  Pukyong National University, Busan Korea
- Year and Date
  2011-08-03
- Data Source
  KAKENHI-PROJECT-23540189
[Presentation] Skewness and geometrical constants for Banach spaces2011
- Author(s)
  三谷健一, 斎藤吉助, 高橋泰嗣
- Organizer
  日本数学会秋期分科会
- Year and Date
  2011-09-28
- Data Source
  KAKENHI-PROJECT-23540189
[Presentation] Skewness and geometrical constants for Banach spaces2011
- Author(s)
  三谷健一
- Organizer
  日本数学会
- Place of Presentation
  信州大学松本キャンパス
- Data Source
  KAKENHI-PROJECT-23540189
[Presentation] Recent development of James constant of two dimensional Lorentz sequence spaces
- Author(s)
  Kichi-Suke Saito, Ken-ichi Mitani and Ryotaro Tanaka
- Organizer
  RIMS研究集会
- Place of Presentation
  京都大学
- Data Source
  KAKENHI-PROJECT-23540189
[Presentation] 2Lorentz数列空間及びその双対空間のJames定数
- Author(s)
  Ken-ichi Mitani , Kichi-Suke Saito and Ryotaro Tanaka
- Organizer
  日本数学会年会
- Place of Presentation
  学習院大学
- Data Source
  KAKENHI-PROJECT-23540189
[Presentation] Convex properties of James and von Neumann-Jordan constant of absolute norms on R^2
- Author(s)
  Naoto Komuro, Kichi-Suke Saito and Ken-Ichi Mitani
- Organizer
  The Eighth International Conference on Nonlinear Analysis and Convex Analysis (NACA2013)
- Place of Presentation
  弘前大学
- Invited
- Data Source
  KAKENHI-PROJECT-23540189
[Presentation] 三角不等式の一般化について
- Author(s)
  泉田保、斎藤吉助､三谷健一
- Organizer
  数理解析研究所研究集会
- Place of Presentation
  京都大学
- Data Source
  KAKENHI-PROJECT-23540189

1. SAITO Kichisuke (30018949)

# of Collaborated Projects: 3 results

# of Collaborated Products: 0 results
2. KATO Mikio (50090551)

# of Collaborated Projects: 2 results

# of Collaborated Products: 1 results
3. WATANABE Keiichi (50210894)

# of Collaborated Projects: 2 results

# of Collaborated Products: 0 results
4. Komuro Naoto (30195862)

# of Collaborated Projects: 2 results

# of Collaborated Products: 5 results
5. HATORI Osamu (70156363)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
6. TOMIZAWA Yukino

# of Collaborated Projects: 0 results

# of Collaborated Products: 1 results
7. 斉藤吉助

# of Collaborated Projects: 0 results

# of Collaborated Products: 76 results

Mitani Kenichi 三谷 健一

三谷 健一 ミタニ ケンイチ

MITANI Ken-ichi 三谷 健一

Research Projects

Research Products

Co-Researchers

バナッハ空間における単位球の幾何学的構造の研究とその応用Principal Investigator

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

Geometric constants of Banach Spaces and their applications

Principal Investigator

Project Period (FY)

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Research Institution

A study of geometric structure of Banach spaces and its applications

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

Various constants and norm inequalities in Banach spaces and its applications

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

[Journal Article] Day-James空間のskewnessに関する最近の進展2023

Author(s)

Journal Title

Data Source

[Journal Article] Skewness of Banas-Fraczek space2023

Author(s)

Journal Title

Data Source

[Journal Article] バナッハ空間のskewnessと単位球のnon-square性について2023

Author(s)

Journal Title

Data Source

[Journal Article] Banach空間のskewnessに関する最近の進展2023

Author(s)

Journal Title

Data Source

[Journal Article] On von Neumann-Jordan constant of generalized Banas-Fraczek spaces II2022

Author(s)

Journal Title

Data Source

[Journal Article] Skewness of Day-James spaces2022

Author(s)

Journal Title

Data Source

[Journal Article] A note on relations between skewness and geometrical constants of Banach spaces2021

Author(s)

Journal Title

Data Source

[Journal Article] A note on relations between skewness and geometrical constants of Banach spaces2021

Author(s)

Journal Title

Data Source

[Journal Article] Some results on skewness and geometrical constants of Banach spaces2021

Author(s)

Journal Title

Data Source

[Journal Article] Some results on skewness and geometrical constants of Banach spaces2021

Author(s)

Journal Title

Data Source

[Journal Article] 精密化された三角不等式の等号成立条件について2019

Author(s)

Journal Title

Data Source

[Journal Article] Geometrical constants of Day James spaces2019

Author(s)

Journal Title

NAID

Data Source

[Journal Article] Von Neumann-Jordan constant of generalized Bana\'{s}-Fr\c{a}czek spaces2019

Mitani Kenichi 三谷健一

三谷健一ミタニケンイチ

MITANI Ken-ichi 三谷健一