Cyclic Difference Sets
Cyclic difference sets are widely used in many research areas and there are an
important combinatorial tool.
A (v,k,ë) cyclic difference set is a subset D = {d1, d2, ..., dk} of the
integers modulo v such that {1,2,...,v-1} can each be represented as a
difference (di - dj) modulo v in exactly ë different ways.
Details on Cyclic Difference Sets and the up today
known results and open problems can be found
in http://www.ccrwest.org/diffsets.html.
