In combinatorics, a difference set is a subset of a group such that the order of is, the size of is, and every nonidentity element of can be expressed as a product of elements of in exactly ways.
Famous quotes containing the words difference and/or set:
“... if the Settlement seeks its expression through social activity, it must learn the difference between mere social unrest and spiritual impulse.”
—Jane Addams (18601935)
“You have a row of dominoes set up; you knock over the first one, and what will happen to the last one is that it will go over very quickly.”
—Dwight D. Eisenhower (18901969)