Countable compactness with respect to ideal via β-open sets. Journal of Pure and Applied Sciences (Science Forum), [S. l.], v. 22, n. 2, 2026. DOI: 10.70882/fyh17f75. Disponível em: https://atbuscienceforum.com.ng/index.php/jpas/article/view/464. Acesso em: 3 sep. 2026.