-1977

Punjab University (Chandigarh, Chandigarh, India)

-1978

Punjab University (Chandigarh, Chandigarh, India)

-1979

Punjab University (Chandigarh, Chandigarh, India)

-1998

Punjab University (Chandigarh, Chandigarh, India)

Department of Mathematics

1987 -to- 1988

University of Alberta

in 2002

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