Fixed Point Theory in MR-Metric Spaces Fundamental Theorems and Applications to Integral Equations and Neutron Transport. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 18, n. 3, p. 6440, 2025. DOI: 10.29020/nybg.ejpam.v18i3.6440. Disponível em: https://www.ejpam.com/index.php/ejpam/article/view/6440. Acesso em: 5 dec. 2025.