Question
Prove that $Z_{v}$ is itself a difference set, in $Z_{\mathrm{v}}$. (These are trivial difference sets.)
Step 1
A difference set in a group \( G \) is a subset \( D \subset G \) such that the list of differences \( d = \{ a - b \mid a, b \in D \} \) contains each element of \( G \) exactly \( \lambda \) times for some integer \( \lambda \). Show more…
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