Andy Liu is a professor in department of Mathematical and Statistical Sciences at the University of Alberta. His research interests span discrete mathematics, hypergraph theory, combinatorial geometry, foundations of mathematics, mathematical education and recreational mathematics. The common characteristics of the research problems he works on are that they are easy to understand but not so easy to solve. In 1985 Bruce Shawyer joined Memorial University as full professor, serving as head of the Department of Mathematics and Statistics from 1985-91. Dr Shawyer's professional interests in mathematics research include approximation of the sums of slowly convergent series, the summability of series and integrals, and Euclidean geometry. He is founder of the mathematical challenge for junior high school students and former head coach of the Canadian team for the International Mathematical Olympiad. Dr Shawyer has authored 118 publications and is currently Editor-in-Chief of the ATOM (A Taste Of Mathematics) book series.