| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 4656466 | Journal of Combinatorial Theory, Series A | 2006 | 17 Pages |
Abstract
Let be a prime. Then there are integers a,b,c,d with , , p2=a2+2(b2+c2+d2), and 2ab=c2-2cd-d2. We show that there is a regular Hadamard matrix of order 4p2 provided that p=a±2b or p=a+δ12b+4δ2c+4δ1δ2d with δi=±1.
Related Topics
Physical Sciences and Engineering
Mathematics
Discrete Mathematics and Combinatorics
