Direct Product Difference Sets

@article{Ganley1977DirectPD,
  title={Direct Product Difference Sets},
  author={Michael J. Ganley},
  journal={J. Comb. Theory, Ser. A},
  year={1977},
  volume={23},
  pages={321-332}
}
The theory of difference sets and relative difference sets has been used to investigate finite projective planes which admit a quasiregular collineation group of “reasonably” large order (see 14, 51.) In this paper we introduce the concept of a direct product difference set (and, in Section 6, a generalized d.p. difference set) to aid our investigation of quasiregular collineation groups. In Section 2 we define a d.p. difference set and show that such a difference set must have parameters of a… CONTINUE READING

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