Skew-Hadamard matrices of orders 436, 580 and 988 exist
classification
🧮 math.CO
keywords
matricesconstructconstructeddifferencefamiliesordersskew-hadamardarray
read the original abstract
We construct two difference families on each of the cyclic groups of order 109, 145 and 247, and use them to construct skew-Hadamard matrices of orders 436, 580 and 988. Such difference families and matrices are constructed here for the first time. The matrices are constructed by using the Goethals-Seidel array.
This paper has not been read by Pith yet.
discussion (0)
Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.