6×6 {-1, +1} matrix of maximal determinant

|Det R| = 5×25 = 5×11×25

Ratio of |Det R| to Ehlich/Wojtas bound: 1

M=RTR=R RT:

6 2 2 0 0 0
2 6 2 0 0 0
2 2 6 0 0 0
0 0 0 6 2 2
0 0 0 2 6 2
0 0 0 2 6 2

R:

-+++++
+-++++
++-+++
----++
---+-+
---++-

Notes:

  1. First reported by Williamson [Wi].
  2. R is unique up to equivalence [Wi].

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Page created 26 January 2002.
Last modified 18 June 2003.
Comments: maxdet@indiana.edu