On Abelian Difference Sets with Parameters of 3-dimensional Projective Geometries

Kevin Jennings

A difference set is said to have classical parameters if $(v,k,\lambda )=(\frac{q^d-1}{q-1},\frac{q^{d-1}-1}{q-1},\frac{q^{d-2}-1}{q-1}).$ The case $d=3$ corresponds to planar diffe…