Functions of convexity and dimension



Abstract

Two dual sequence functions describing some kind of local convexity and dimension of subspaces of linear metric spaces are introduced. It is shown that the functions give a useful tool in the investigations of fixed point properties of the Schauder type.


Keywords

the Schauder fixed point theorem; measure of convexity and dimension

1. Engelking R., Dimension Theory, PWN. North-Holland Publishing Company, Warszawa-Amsterdam-Oxford-New York 1978.
2. Dugundji J., Granas A., Fixed Point Theory, PWN, Warszawa 1982.
3. Dugundji J., Granas A., Fixed Point Theory, Springer Monographs in Mathematics, Springer-Verlag, New York 2003.
4. Hadžić O., Some properties of measures of noncompactness in paranormed spaces, Proc. Amer. Math. Soc., 102(4) (1988), 843-849.
5. Kuratowski K., Sur les espaces completes, Fund. Math., 15 (1930), 301-309.
6. Rolewicz S., Metric Linear Spaces, PWN. D. Reidel Publishing Company, Warszawa-Dordrecht-Boston-Lancaster 1984.
7. Wędrychowicz S., Compactness Conditions for Nonlinear Differential and Integral Equations, Wydawnictwo Uniwersytetu Jagiellońskiego, Kraków 2001.
8. Zima K., On Schauder's fixed point theorem with respect to para-normed space, Comment. Math. Prace Mat., 19 (1977), 421-423.
Download

Published : 2005-09-30


KulpaT. (2005). Functions of convexity and dimension. Annales Mathematicae Silesianae, 19, 23-29. Retrieved from https://journals.us.edu.pl/index.php/AMSIL/article/view/14081

Tomasz Kulpa  tkulpa@ux2.math.us.edu.pl
Instytut Matematyki, Uniwersytet Śląski w Katowicach  Poland



The Copyright Holders of the submitted text are the Author and the Journal. The Reader is granted the right to use the pdf documents under the provisions of the Creative Commons 4.0 International License: Attribution (CC BY). The user can copy and redistribute the material in any medium or format and remix, transform, and build upon the material for any purpose.

  1. License
    This journal provides immediate open access to its content under the Creative Commons BY 4.0 license (http://creativecommons.org/licenses/by/4.0/). Authors who publish with this journal retain all copyrights and agree to the terms of the above-mentioned CC BY 4.0 license.
  2. Author’s Warranties
    The author warrants that the article is original, written by stated author/s, has not been published before, contains no unlawful statements, does not infringe the rights of others, is subject to copyright that is vested exclusively in the author and free of any third party rights, and that any necessary written permissions to quote from other sources have been obtained by the author/s.
  3. User Rights
    Under the Creative Commons Attribution license, the users are free to share (copy, distribute and transmit the contribution) and adapt (remix, transform, and build upon the material) the article for any purpose, provided they attribute the contribution in the manner specified by the author or licensor.
  4. Co-Authorship
    If the article was prepared jointly with other authors, the signatory of this form warrants that he/she has been authorized by all co-authors to sign this agreement on their behalf, and agrees to inform his/her co-authors of the terms of this agreement.