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- W2058754382 abstract "A Hadamard difference set is a difference set with parameters of the form (v, k, λ, n) = (4m2, 2m2−m, m2−m, m2). It is shown that if an abelian group G contains a Hadamard difference set, then certain subgroups of G must also contain Hadamard difference sets. This result allows the known nonexistence theorems for Hadamard difference sets to be extended to many more groups. It is also shown that if a Hadamard difference set in an abelian group has minus one as a multiplier, then the square-free part of the parameter m can only have the prime factors 2 and 3." @default.
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- W2058754382 date "1990-05-01" @default.
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- W2058754382 title "Sub-difference sets of Hadamard difference sets" @default.
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- W2058754382 doi "https://doi.org/10.1016/0097-3165(90)90009-l" @default.
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