Winnipeg 1997 conference report

’ Department of Computer Science, University of Maryland, College Park, MD 20742, USA b Department of Mathematics and Computer Science, Wake Forest University, P.O. Box 7311, Winston Salem, NC 27109, USA ’ Department of Mathematics, University of Wisconsin, 480 Lincoln Drive, Madison, WI 53706. USA ’ Department of Mathematics and Institute of Industrial Mathematical Sciences, University of Manitoba, Winnipeg, Manitoba R3T 2N2 ,Canada