14×14 {-1, +1} matrix of maximal determinant

|Det R| = 9477×213 = 39×35×213

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

M=RTR=R RT:

14  2  2  2  2  2  2  0  0  0  0  0  0  0
 2 14  2  2  2  2  2  0  0  0  0  0  0  0
 2  2 14  2  2  2  2  0  0  0  0  0  0  0
 2  2  2 14  2  2  2  0  0  0  0  0  0  0
 2  2  2  2 14  2  2  0  0  0  0  0  0  0
 2  2  2  2  2 14  2  0  0  0  0  0  0  0
 2  2  2  2  2  2 14  0  0  0  0  0  0  0
 0  0  0  0  0  0  0 14  2  2  2  2  2  2
 0  0  0  0  0  0  0  2 14  2  2  2  2  2
 0  0  0  0  0  0  0  2  2 14  2  2  2  2
 0  0  0  0  0  0  0  2  2  2 14  2  2  2
 0  0  0  0  0  0  0  2  2  2  2 14  2  2
 0  0  0  0  0  0  0  2  2  2  2  2 14  2
 0  0  0  0  0  0  0  2  2  2  2  2  2 14

R:

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

Notes:

  1. Reported to be maximal in [E1].
  2. R is unique up to equivalence [C3].

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Page created 26 January 2002.
Last modified 5 November 2005.
Comments: maxdet@indiana.edu