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A Sufficient Condition That $J(X^*)=J(X)$ Holds for a Banach Space $X$

KOMURO, Naoto, SAITO, Kichi-Suke, and TANAKA, Ryotaro
Tokyo Journal of Mathematics Volume 41, Number 1 (June 2018), 219-223.

Journal article

Geometric constants of π/2-rotation invariant norms on R2

Tomizawa, Yukino, Mitani, Ken-Ichi, Saito, Kichi-Suke, and Tanaka, Ryotaro
Annals of Functional Analysis Volume 8, Number 2 (May 2017), 215-230.

Journal article

Dual of extremal absolute norms on R2 and the James constant

Sato, Masahiro, Komuro, Naoto, Mitani, Ken-Ichi, Saito, Kichi-Suke, and Tanaka, Ryotaro
Banach Journal of Mathematical Analysis Volume 10, Number 2 (April 2016), 251-266.

Journal article

Generalized centers and characterizations of inner product spaces

Endo, Hiroshi and Tanaka, Ryotaro
Nihonkai Mathematical Journal Volume 27, Number 1-2 (2016), 29-40.

Journal article

On generalized Beckner's inequality

Saito, Kichi-Suke and Tanaka, Ryotaro
Annals of Functional Analysis Volume 6, Number 1 (2015), 267-278.

Journal article

Orthogonal bases and a structure of finite dimensional normed linear spaces

Saito, Kichi-Suke and Tanaka, Ryotaro
Banach Journal of Mathematical Analysis Volume 8, Number 1 (2014), 89-97.

Journal article

Characterization of Regular Norms of $\mathbb{R}^n$

Tanaka, Ryotaro and Saito, Kiche-Suke
Nihonkai Mathematical Journal Volume 24, Number 2 (2013), 103-120.

Journal article

The Dunkl-Williams constant of symmetric octagonal norms on $\mathbb{R}^2$

Mizuguchi, Hiroyasu, Saito, Kichi-Suke, and Tanaka, Ryotaro
Nihonkai Mathematical Journal Volume 23, Number 2 (2012), 93-113.

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