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    On (p^a,p^b,p^a,p^{a-b})-relative difference sets by Schmidt, Bernhard

    Published 2009
    “…This paper provides new exponent and rank conditions for the existence of abelian relative (p^a,p^b,p^a,p^a-b) -difference sets. It is also shown that no splitting relative (2^2c,2^d,2^2c,2^2c-d)-difference set exists if d > c and the forbidden subgroup is abelian. …”
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    Journal Article
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