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THREE GEOMETRIC CONSTANTS FOR MORREY SPACES

  • Gunawan, Hendra (Faculty of Mathematics and Natural Sciences Bandung Institute of Technology) ;
  • Kikianty, Eder (Department of Mathematics and Applied Mathematics University of Pretoria) ;
  • Sawano, Yoshihiro (Department of Mathematics and Information Science Tokyo Metropolitan University) ;
  • Schwanke, Christopher (Department of Mathematics Lyon College)
  • Received : 2019.01.04
  • Accepted : 2019.07.08
  • Published : 2019.11.30

Abstract

In this paper we calculate three geometric constants, namely the von Neumann-Jordan constant, the James constant, and the Dunkl-Williams constant, for Morrey spaces and discrete Morrey spaces. These constants measure uniformly nonsquareness of the associated spaces. We obtain that the three constants are the same as those for $L^1$ and $L^{\infty}$ spaces.

Keywords

References

  1. D. R. Adams and J. Xiao, Morrey spaces in harmonic analysis, Ark. Mat. 50 (2012), no. 2, 201-230. https://doi.org/10.1007/s11512-010-0134-0
  2. E. Casini, About some parameters of normed linear spaces, Atti Accad. Naz. Lincei Rend. Cl. Sci. Fis. Mat. Natur. (8) 80 (1986), no. 1-2, 11-15 (1987).
  3. C. F. Dunkl and K. S. Williams, Mathematical notes: a simple norm inequality, Amer. Math. Monthly 71 (1964), no. 1, 53-54. https://doi.org/10.2307/2311304
  4. J. Gao and K.-S. Lau, On the geometry of spheres in normed linear spaces, J. Austral. Math. Soc. Ser. A 48 (1990), no. 1, 101-112. https://doi.org/10.1017/S1446788700035230
  5. H. Gunawan, E. Kikianty, and C. Schwanke, Discrete Morrey spaces and their inclusion properties, Math. Nachr. 291 (2018), no. 8-9, 1283-1296. https://doi.org/10.1002/mana.201700054
  6. R. C. James, Uniformly non-square Banach spaces, Ann. of Math. (2) 80 (1964), 542-550. https://doi.org/10.2307/1970663
  7. A. Jimenez-Melado, E. Llorens-Fuster, and E. M. Mazcunan-Navarro, The Dunkl-Williams constant, convexity, smoothness and normal structure, J. Math. Anal. Appl. 342 (2008), no. 1, 298-310. https://doi.org/10.1016/j.jmaa.2007.11.045
  8. P. Jordan and J. Von Neumann, On inner products in linear, metric spaces, Ann. of Math. (2) 36 (1935), no. 3, 719-723. https://doi.org/10.2307/1968653
  9. M. Kato and L. Maligranda, On James and Jordan-von Neumann constants of Lorentz sequence spaces, J. Math. Anal. Appl. 258 (2001), no. 2, 457-465. https://doi.org/10.1006/jmaa.2000.7367
  10. Y. Sawano, S. Sugano, and H. Tanaka, Olsen's inequality and its applications to Schrodinger equations, in Harmonic analysis and nonlinear partial differential equations, 51-80, RIMS Kokyuroku Bessatsu, B26, Res. Inst. Math. Sci. (RIMS), Kyoto, 2011.