About Author(s) Prof Surjeet Singh started his teaching career as an assistant lecturer in Mathematics at Kirori Mal College, Delhi in 1963. After his Ph.D. from the University of Delhi in 1969, he joined Aligarh Muslim University as Reader in Mathematics, where he taught up to 1975. During his stay there he supervised a number of students for their Ph.D. He became the professor and head of Department of Mathematics at Guru Nanak Dev University, Amritsar in 1975 and worked there up to 1979. Thereafter, he moved to Kuwait University at Kuwait, and after 18 years, he joined King Saud University, Riyadh, Saudi Arabia where he taught up to 2005. During his career, he held visiting assignments at Ohio University, USA, University of Montreal and McMaster University, Canada, and Panjab University, Chandigarh. More than 85 of his research papers on ring theory have been published in international journals of repute. He has also authored a book on Linear Algebra published by Vikas.