An Approach to Closure and Kernel Defined through $N$-points. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 18, n. 3, p. 6339, 2025. DOI: 10.29020/nybg.ejpam.v18i3.6339. Disponível em: https://www.ejpam.com/index.php/ejpam/article/view/6339. Acesso em: 5 dec. 2025.