Dr. Sougata Biswas

Assistant Professor (Stage-II) 

Department of Mathematics

Siksha Bhavana (Institute of Science)

Visva-Bharati (A Central University)

Santiniketan-731235

West Bengal, India

My profile at Google Scholar , Researchgate . 

Change is a nature of a life but challenge is an aim of life. So always challenge the changes, don't change the challenges.