On Upper and Lower Almost $\tau^\star\alpha(\sigma_1,\sigma_2)$-continuous Multifunctions

Authors

  • Chokchai Viriyapong
  • Areeyuth Sama-Ae
  • Chawalit Boonpok Mahasarakham University

DOI:

https://doi.org/10.29020/nybg.ejpam.v18i4.7045

Keywords:

upper almost $\tau^\star\alpha(\sigma_1,\sigma_2)$-continuous multifunction, lower almost $\tau^\star\alpha(\sigma_1,\sigma_2)$-continuous multifunction

Abstract

This paper introduces new classes of continuous multifunctions defined between an ideal topological
space and a bitopological space, called upper almost $\tau^\star\alpha(\sigma_1,\sigma_2)$-continuous
multifunctions and lower almost $\tau^\star\alpha(\sigma_1,\sigma_2)$-continuous multifunctions.
Furthermore, several characterizations and some properties concerning upper almost
$\tau^\star\alpha(\sigma_1,\sigma_2)$-continuous multifunctions and lower almost
$\tau^\star\alpha(\sigma_1,\sigma_2)$-continuous multifunctions are investigated.

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Published

2025-11-05

Issue

Vol. 18 No. 4: (October 2025)

Section

Topology

License

Copyright (c) 2025 Chokchai Viriyapong, Areeyuth Sama-Ae, Chawalit Boonpok

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How to Cite

On Upper and Lower Almost $\tau^\star\alpha(\sigma_1,\sigma_2)$-continuous Multifunctions. (2025). European Journal of Pure and Applied Mathematics, 18(4), 7045. https://doi.org/10.29020/nybg.ejpam.v18i4.7045