Definition:Steiner Triple System

Definition
A Steiner triple system of order $$v$$ is a BIBD with block size 3, and each pair of points occuring together in exactly 1 block (called a triple).

Notation

 * BIBD$$(v,b,r,3,1)$$,
 * BIBD$$(v,3,1)$$,
 * STS$$(v)$$.