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.
Read more about Difference Set: Basic Facts, Multipliers, Parameters, Known Difference Sets, Application, Generalisations
Famous quotes containing the words difference and/or set:
“The first idea that the child must acquire, in order to be actively disciplined, is that of the difference between good and evil; and the task of the educator lies in seeing that the child does not confound good with immobility and evil with activity.”
—Maria Montessori (1870–1952)
“And set off briskly for so slow a thing,
Still going every which way in the joints, though,
So that it looked like lightning or a scribble.”
—Robert Frost (1874–1963)