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Full-Text Articles in Physical Sciences and Mathematics
A New Family Of Relative Difference Sets In 2-Groups, James A. Davis, Jonathan Jedwab
A New Family Of Relative Difference Sets In 2-Groups, James A. Davis, Jonathan Jedwab
Department of Math & Statistics Faculty Publications
We recursively construct a new family of (26d+4, 8, 26d+4, 26d+1) semi-regular relative difference sets in abelian groups G relative to an elementary abelian subgroup U. The initial case d = 0 of the recursion comprises examples of (16, 8, 16, 2) relative difference sets for four distinct pairs (G, U).
Some Recent Developments In Difference Sets, James A. Davis, Jonathan Jedwab
Some Recent Developments In Difference Sets, James A. Davis, Jonathan Jedwab
Department of Math & Statistics Faculty Publications
There are five known parameter families for (v, k, λ, n)- difference sets satisfying gcd(v, n)>1: the Hadamard, McFarland, Spence, Davis-Jedwab, and Chen families. The authors recently gave a recursive unifying construction for difference sets from the first four families which relies on relative difference sets. We give an overview of this construction and show that, by modifying it to use divisible difference sets in place of relative difference sets, the recent difference set discoveries of Chen can be brought within the unifying framework. We also demonstrate the recursive use of an auxiliary construction for …