PURNA CHANDRA BISWAL, Ph.D. (Indian Institute of Science, Bangalore), is Assistant Professor of Mathematics at Parala Maharaja Engineering College, Berhampur, Odisha. Earlier, Dr. Biswal served at the National Institute of Science & Technology, Berhampur and worked for three years in the department of mathematics at the Birla Institute of Technology and Science, Pilani. He has authored six books, out of which four are published by PHI Learning, Delhi.
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