# 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.