1. Department of Applied Mathematics and Statistics University of São Paulo (USP) Av. Trabalhador São‐carlense, 400 São Carlos SP 13560‐970 Brazil
2. Department of Mathematics Universidade Estadual Paulista (UNESP) Av. Luiz Edmundo Carrijo Coube, 14‐01 Bauru SP 17033‐360 Brazil
3. Department of Computer Science Universidade Federal da Grande Dourados Rodovia Dourados/Itahum, Km 12 Dourados MS 79804‐970 Brazil
4. Department of Electrical and Computer Engineering University of São Paulo (USP) Av. Trabalhador São‐carlense, 400 São Carlos SP 13560‐970 Brazil