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

Authors

  • Jeeranunt Khampakdee
  • Areeyuth Sama-ae
  • Chawalit Boonpok Mahasarakham University

DOI:

https://doi.org/10.29020/nybg.ejpam.v18i4.7044

Keywords:

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

Abstract

A new class of continuous multifunctions between an ideal topological space and a bitopological space,
called upper (lower) $\tau^\star\alpha(\sigma_1,\sigma_2)$-continuous multifunctions, has been defined
and studied. Moreover, several characterizations and some properties concerning upper
$\tau^\star\alpha(\sigma_1,\sigma_2)$-continuous multifunctions and
lower $\tau^\star\alpha(\sigma_1,\sigma_2)$-continuous multifunctions are established.

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Published

2025-11-05

Issue

Vol. 18 No. 4: (October 2025)

Section

Topology

License

Copyright (c) 2025 Jeeranunt Khampakdee, Areeyuth Sama-ae, Chawalit Boonpok

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How to Cite

Upper and Lower $\tau^\star\alpha(\sigma_1,\sigma_2)$-continuity. (2025). European Journal of Pure and Applied Mathematics, 18(4), 7044. https://doi.org/10.29020/nybg.ejpam.v18i4.7044