How many different (7,7,3,3,1) BIBD are there on vertex set? Note that two such designs are different if their sets of blocks are different. That is, we do not require that the BIBDs be ...
Let D be a BIBD with parameters (b,v,r,3,1). Prove that either v=6i+1 or v=6i+3 for some non-negative integer i. BIBD stands for a Balanced Incomplete Block Design My work, theorem states that bk=vr ...