An Investigation of q-Rung Orthopair Fuzzy Subgroups and Fundamental Isomorphism Theorems. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 18, n. 3, p. 5832, 2025. DOI: 10.29020/nybg.ejpam.v18i4.5832. Disponível em: https://www.ejpam.com/ejpam/article/view/5832. Acesso em: 23 feb. 2026.