[1] Beijing Inst Technol, Sch Math & Stat, Beijing 100081, Peoples R China
[2] Mohi Ud Din Islamic Univ, Dept Math, Nerian Sharif 12010, Azad Jammu & Ka, Pakistan
[3] Guangxi Minzu Univ, Ctr Appl Math Guangxi, Sch Math & Phys, Nanning 530006, Peoples R China
[4] Baish Jazan Univ, Coll Appl Ind Technol CAIT, Dept Elect Engn Technol, Jazan, Saudi Arabia
[5] Princess Nourah Biny Abdulrahman Univ, Dept Math Sci, POB 84428, Riyadh 11671, Saudi Arabia
[6] Northern Border Univ, Coll Sci, Dept Math, POB 1321, Ar Ar, Saudi Arabia