Ryotaro Tanaka

Available identifiers

zbMath Open tanaka.ryotaroMaRDI QIDQ231963

List of research outcomes

Publication	Date of Publication	Type
Di-orthographs of Banach spaces that are not invariant of nonlinear Birkhoff-James orthogonality preservers	2024-01-19	Paper
Level numbers of a bounded linear operator between normed linear spaces and singular value decomposition revisited	2023-04-13	Paper
Nonlinear classification of Banach spaces based on geometric structure spaces	2023-02-17	Paper
On Birkhoff-James orthogonality preservers between real non-isometric Banach spaces	2022-10-21	Paper
Nonlinear equivalence of Banach spaces based on Birkhoff-James orthogonality. II	2022-06-13	Paper
A nonlinear characterization of type I factors based on strong Birkhoff-James orthogonality	2022-04-01	Paper
Nonlinear equivalence of Banach spaces based on Birkhoff-James orthogonality	2021-10-22	Paper
Non-linear modular Birkhoff-James orthogonality preservers between spaces of continuous functions	2021-02-25	Paper
https://portal.mardi4nfdi.de/entity/Q5142562	2020-12-31	Paper
𝐶*-algebras with weak* angelic dual balls	2020-12-04	Paper
Modular Birkhoff-James orthogonality in \(B(\mathbb{X,Y})\) and \(K(\mathbb{X,Y})\)	2020-08-21	Paper
On symmetry of strong Birkhoff orthogonality in \(B(\mathcal{H},\mathcal{K})\) and \(K(\mathcal{H},\mathcal{K})\)	2020-07-17	Paper
A characterization of Radon planes using generalized Day-James spaces	2020-01-20	Paper
Constructing a Lipschitz retraction from ℬ(ℋ) onto 𝒦(ℋ)	2019-09-09	Paper
Complementarity of subspaces of ℓ_∞ revisited	2019-08-14	Paper
On symmetry of Birkhoff orthogonality in the positive cones of \(C^{\ast}\)-algebras with applications	2019-05-10	Paper
A solution to Tingley's problem for isometries between the unit spheres of compact \(\mathrm C^*\)-algebras and \(\mathrm {JB}^*\)-triples	2019-03-07	Paper
https://portal.mardi4nfdi.de/entity/Q4617673	2019-02-06	Paper
LEFT SYMMETRIC POINTS FOR BIRKHOFF ORTHOGONALITY IN THE PREDUALS OF VON NEUMANN ALGEBRAS	2018-12-03	Paper
A sufficient condition that \(J(X^\ast)=J(X)\) holds for a Banach space \(X\)	2018-10-26	Paper
Symmetric points for (strong) Birkhoff orthogonality in von Neumann algebras with applications to preserver problems	2018-05-03	Paper
On vector-valued Banach limits with values in $\mathcal{B}(\mathcal{H})$	2018-04-27	Paper
Generalized centers and characterizations of inner product spaces	2017-12-20	Paper
A comparison between James and von Neumann-Jordan constants	2017-11-08	Paper
On the class of Banach spaces with James constant √2, III	2017-11-01	Paper
Tingley's problem on finite von Neumann algebras	2017-03-28	Paper
Geometric constants of \(\pi/2\)-rotation invariant norms on \(\mathbb{R}^{2}\)	2017-03-14	Paper
On the class of Banach spaces with James constant \(\sqrt 2\). II	2016-11-30	Paper
Spherical isometries of finite dimensional \(C^{\ast}\)-algebras	2016-10-10	Paper
A solution to Tingley's problem for isometries between the unit spheres of compact C$^*$-algebras and JB$^*$-triples	2016-08-22	Paper
On the class of Banach spaces with James constant 2	2016-07-27	Paper
https://portal.mardi4nfdi.de/entity/Q2812280	2016-06-16	Paper
https://portal.mardi4nfdi.de/entity/Q2812281	2016-06-16	Paper
Dual of extremal absolute norms on \(\mathbb{R}^2\) and the James constant	2016-04-29	Paper
The solution of Tingley's problem for the operator norm unit sphere of complex \(n\times n\) matrices	2016-03-03	Paper
https://portal.mardi4nfdi.de/entity/Q2789180	2016-02-26	Paper
https://portal.mardi4nfdi.de/entity/Q3464570	2016-01-27	Paper
https://portal.mardi4nfdi.de/entity/Q3464574	2016-01-27	Paper
New geometric properties of Banach spaces	2015-08-11	Paper
When does the equality \(J(X^*)=J(X)\) hold for a two-dimensional Banach space \(X\)?	2015-08-10	Paper
On generalized Beckner's inequality	2015-05-29	Paper
A FURTHER PROPERTY OF SPHERICAL ISOMETRIES	2014-10-15	Paper
Tingley's problem on symmetric absolute normalized norms on \(\mathbb R^2\)	2014-09-11	Paper
On the frame of the unit ball of Banach spaces	2014-08-29	Paper
Geometric constants and characterizations of inner product spaces	2014-06-20	Paper
Characterization of regular norms of \(\mathbb{R}^n\)	2014-04-11	Paper
Every \(n\)-dimensional normed space is the space \(\mathbb R^n\) endowed with a normal norm	2013-12-18	Paper
Orthonormal bases and a structure of finite dimensional normed linear spaces	2013-11-13	Paper
Another approach to Beckner's inequality	2013-10-24	Paper
https://portal.mardi4nfdi.de/entity/Q2839847	2013-07-12	Paper
On the calculation of the Dunkl-Williams constant of normed linear spaces	2013-06-14	Paper
The Dunkl-Williams constant of symmetric octagonal norms on \(\mathbb{R}^2\)	2013-03-13	Paper
Exactly conservative semi-Lagrangian scheme for multi-dimensional hyperbolic equations with directional splitting technique	2002-05-20	Paper

Research outcomes over time

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