Exact difference triangles. (English) Zbl 0355.05008
MSC:
05B10 | Combinatorial aspects of difference sets (number-theoretic, group-theoretic, etc.) |
05B25 | Combinatorial aspects of finite geometries |
05B10 | Combinatorial aspects of difference sets (number-theoretic, group-theoretic, etc.) |
05B25 | Combinatorial aspects of finite geometries |