Banach-Mazur Distance Between Two Dimensional Banach Spaces

Authors

  • S. A. Al-Mezel Department of Mathematics, King Abdulaziz University, Jeddah, Saudi Arabia

DOI:

https://doi.org/10.5644/SJM.02.2.07

Keywords:

Banach spaces, Banach-Mazur distance

Abstract

The purpose of the present paper is to investigate geometric properties of two-dimensional Banach spaces. We are also concerned with the Banach-Mazur distance between Banach spaces. For real or complex spaces $d(l^2_1,l^2_p)= 2^{1-\frac{1}{p}},$ if $1\leq p\leq 2$ and if $1\leq p\leq \infty$ and $l_p^2$ is two-dimensional real space, then $d(l^2_1,l^2_p)= 2^{\frac{1}{p}}.$

 

1991 Mathematics Subject Classification. 46B03, 46B03

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References

H. Cohen, A Bound-two isomorphism between C(X) Banach spaces, Proc. Amer. Math. Soc., 50 (1975), 215–217.

F. John, Extreme problems with inqualities as subsidiary conditions , Courant Anniversary volume, (1948), 187–204, Interscience, New York.

J. Lamperti, On the isometries of certain function-spaces, Pacific J. Math., 8 (1958), 459–466.

S. Al-mezel, Generalisation of the Banach-Stone theorem, M.Phil Thesis, Mathematics Department, University of Wales Swansea, United Kingdom, 2000.

V. E. Mazaev, V. E. Gurari and M. E. Kadec, On the distance between isomorphic Lp spaces of finite dimension (Russian), Matematiceskii Sbornik 70 (112) 4 (1966), 481–489.

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Published

12.06.2024

How to Cite

Al-Mezel, S. A. (2024). Banach-Mazur Distance Between Two Dimensional Banach Spaces. Sarajevo Journal of Mathematics, 2(2), 205–210. https://doi.org/10.5644/SJM.02.2.07

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