1. Facultad de Matemáticas; Universidad Autónoma de Guerrero; Chilpancingo Guerrero México
2. CONACyT-Tecnológico Nacional de México/CENIDET; Interior Internado Palmira S/N; Col. Palmira, C.P. 62490 Cuernavaca Morelos México
3. Department of Mathematics. Faculty of Arts and Sciences; Najran University; Najran Saudi Arabia
4. Department of Mathematics, Faculty of Applied Science; Taiz University; Taiz Yemen
5. Tecnológico Nacional de México/CENIDET; Interior Internado Palmira S/N; Col. Palmira, C.P. 62490 Cuernavaca Morelos México