SET THEORY: THE STUDY OF SETS, THEIR OPERATIONS, AND THE RELATIONS BETWEEN THEM. Multidisciplinary Journal of Science and Technology, [S. l.], v. 5, n. 1, p. 622–623, 2025. Disponível em: https://mjstjournal.com/index.php/mjst/article/view/2548. Acesso em: 16 jun. 2026.