On Fri, 2005-08-04 at 16:44 -0400, Stavros Macrakis wrote: > Try setting > gcd:'spmod$ That's got it, thanks again! Bob -- Dr. Robert J. Jerrard, Professor of Mathematics, Concordia University College of Alberta, 7128 Ada Blvd., Edmonton, Alberta, T5B 4E4, Canada. Phone: (780) 479-9291, Fax: (780) 474-1933.