Upper and Lower Quasi $\theta\tau^\star(\sigma_1,\sigma_2)$-continuity

Authors

  • Napassanan Srisarakham Mathematics and Applied Mathematics Research Unit, Department of Mathematics, 5 Faculty of Science, Mahasarakham University, Maha Sarakham, 44150, Thailand
  • Areeyuth Sama-Ae Department of Mathematics and Computer Science, Faculty of Science and Technology, Prince of Songkla University, Pattani Campus, Pattani, 94000, Thailand
  • Chawalit Boonpok Mathematics and Applied Mathematics Research Unit, Department of Mathematics, 5 Faculty of Science, Mahasarakham University, Maha Sarakham, 44150, Thailand

DOI:

https://doi.org/10.29020/nybg.ejpam.v18i3.6569

Keywords:

upper quasi $\theta\tau^\star(\sigma_1,\sigma_2)$-continuous multifunction;, lower quasi $\theta\tau^\star(\sigma_1,\sigma_2)$-continuous multifunction

Abstract

This paper presents new concepts of continuous multifunctions, called upper quasi
$\theta\tau^\star(\sigma_1,\sigma_2)$-continuous multifunctions and lower quasi
$\theta\tau^\star(\sigma_1,\sigma_2)$-continuous multifunctions. Moreover, several characterizations
and some properties concerning upper quasi $\theta\tau^\star(\sigma_1,\sigma_2)$-continuous
multifunctions and lower quasi $\theta\tau^\star(\sigma_1,\sigma_2)$-continuous multifunctions are
considered.

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Published

2025-08-01

Issue

Vol. 18 No. 3: (July 2025)

Section

Topology

License

Copyright (c) 2025 Napassanan Srisarakham, Areeyuth Sama-Ae, Chawalit Boonpok

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How to Cite

Upper and Lower Quasi $\theta\tau^\star(\sigma_1,\sigma_2)$-continuity. (2025). European Journal of Pure and Applied Mathematics, 18(3), 6569. https://doi.org/10.29020/nybg.ejpam.v18i3.6569