Authors
Moustapha Camara
Mathematics and Applications Laboratory, U.F.R of Sciences and Technologie, University Assane Seck of Ziguinchor, Ziguinchor, Senegal
Moussa Fall
Mathematics and Applications Laboratory, U.F.R of Sciences and Technologie, University Assane Seck of Ziguinchor, Ziguinchor, Senegal
Oumar Sall
Mathematics and Applications Laboratory, U.F.R of Sciences and Technologie, University Assane Seck of Ziguinchor, Ziguinchor, Senegal