On \((2n,2,2n,n)\) relative difference sets
The author proves the following interesting non-existence result on \((2n,2,2n,n)\) relative difference sets: the Sylow 2-subgroup of the underlying group \(G\) has to be non-cyclic and \(n\) is even provided that \(n\neq 1\). He also constructs some examples relative to non-normal subgroups.
scientific article; zbMATH DE number 1902852