Ring geometries, Two-Weight Codes and Strongly Regular Graphs
Eimear Byrne, Marcus Greferath, Thomas Honold · arXiv (Cornell University) · 2007
It is known that a linear two-weight code $C$ over a finite field $\F_q$ corresponds both to a multiset in a projective space over $\F_q$ that meets every hyperplane in either $a$ or $b$ points for some integers $a