48×48 {-1, +1} matrices of maximal determinant

|Det Rj| = 158993694406781688266883072×247 = 24×1223×247

Ratio of |Det Rj| to Hadamard bound: 1

M=RjTRj= Rj RjT=48 I
where I is the 48×48 identity matrix.

Notes:

  1. Maximal matrix first reported by Hadamard [Had].
  2. N. J. A. Sloane's Library of Hadamard matrices has a Hadamard matrix of order 48.
  3. The list is presumably not complete.

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Page created 15 March 2002.
Last modified 26 January 2003.
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