Abstract
A \((v,k,\lambda )\) difference set in a group G is a subset \(\{d_1, d_2, \ldots ,d_k\}\) of G such that \(D=\sum d_i\) in the group ring \({\mathbb {Z}}[G]\) satisfies
where \(n=k-\lambda \). If \(D=\sum s_i d_i\), where the \(s_i \in \{ \pm 1\}\), satisfies the same equation, we will call it a signed difference set. This generalizes both difference sets (all \(s_i=1\)) and circulant weighing matrices (G cyclic and \(\lambda =0\)). We will show that there are other cases of interest, and give some results on their existence.
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The datasets generated during this research [8] are available free online at Zenodo.
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Gordon, D.M. Signed difference sets. Des. Codes Cryptogr. 91, 2107–2115 (2023). https://doi.org/10.1007/s10623-022-01171-8
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DOI: https://doi.org/10.1007/s10623-022-01171-8