Criteria for Finite-Time Convergence in Discrete Variable-Order Fractional FitzHugh–Nagumo Reaction–Diffusion Systems. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 18, n. 4, p. 7005, 2025. DOI: 10.29020/nybg.ejpam.v18i4.7005. Disponível em: https://www.ejpam.com/index.php/ejpam/article/view/7005. Acesso em: 5 dec. 2025.