On Upper and Lower $\mu(\sigma_1,\sigma_2)$-continuous Multifunctions

Authors

  • Nipaporn Chutiman
  • Areeyuth Sama-Ae
  • Chawalit Boonpok Mahasarakham University

DOI:

https://doi.org/10.29020/nybg.ejpam.v18i4.7051

Keywords:

upper $\mu(\sigma_1,\sigma_2)$-continuous multifunction, lower $\mu(\sigma_1,\sigma_2)$-continuous multifunction

Abstract

This paper presents new concepts of continuous multifunctions defined from a generalized topological
space into a bitopological space, called upper $\mu(\sigma_1,\sigma_2)$-continuous multifunctions and
lower $\mu(\sigma_1,\sigma_2)$-continuous multifunctions. Furthermore, several characterizations and
some properties concerning upper $\mu(\sigma_1,\sigma_2)$-continuous multifunctions and lower
$\mu(\sigma_1,\sigma_2)$-continuous multifunctions are discussed.

Downloads

Published

2025-11-05

Issue

Vol. 18 No. 4: (October 2025)

Section

Topology

License

Copyright (c) 2025 Nipaporn Chutiman, Areeyuth Sama-Ae, Chawalit Boonpok

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

Upon acceptance of an article by the European Journal of Pure and Applied Mathematics, the author(s) retain the copyright to the article. However, by submitting your work, you agree that the article will be published under the Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0). This license allows others to copy, distribute, and adapt your work, provided proper attribution is given to the original author(s) and source. However, the work cannot be used for commercial purposes.

By agreeing to this statement, you acknowledge that:

  • You retain full copyright over your work.
  • The European Journal of Pure and Applied Mathematics will publish your work under the Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0).
  • This license allows others to use and share your work for non-commercial purposes, provided they give appropriate credit to the original author(s) and source.

How to Cite

On Upper and Lower $\mu(\sigma_1,\sigma_2)$-continuous Multifunctions. (2025). European Journal of Pure and Applied Mathematics, 18(4). https://doi.org/10.29020/nybg.ejpam.v18i4.7051