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# User:Abdullahi Umar

The author graduated from Ahmadu Bello University (A. B. U.) Zaria, Nigeria (1983) with an honours degree in mathematics where he also obtained an M. Sc. degree (1987). He then proceeded to the University of St Andrews, Scotland, U. K., where he obtained a Ph. D. degree (1992). Between 1993 and 1997 he was at the A. B.U., Zaria, University of Abuja (Nigeria), University of St Andrews and University of Essex; King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia (1997 - 2007), Sultan Qaboos University, Oman (2007 - 2015) and is now at the Petroleum Institute, Abu Dhabi, U. A. E (2014 - ?). The author is a pure mathematician (algebraist) but has interests in combinatorics, recreational mathematics: magic squares, magic cubes, e.t.c.