June 5, 2008
12:44 a.m.
Brandon Mintern wrote:
Intuitively, it _shouldn't_ matter what order the arguments are in. What is the meaning of taking the set-difference of a bunch of sets? Should we promote an operation that doesn't make any sense?
Taking a lead from mathematics here, there are symbols for the sum and product of a sequence (big-sigma and big-pi) but not difference or quotient, for similar reasons. -- Greg