2021/10/05 by Kalmanovich, Daniel
#05B05 #05B30 #Combinatorics (math.CO) #FOS: Mathematics
paper · doi:10.48550/arxiv.2110.01847
We consider a generalization of the notion of partially balanced incomplete block designs (PBIBDs), by relaxing the requirement that the underlying association scheme be commutative. An infinite family of such generalizations is constructed, one for each prime power q congruent to 1 modulo 4.