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Paper   IPM / M / 8714
School of Mathematics
  Title:   Williamson matrices up to order 59
  Author(s):  B. Tayfeh-Rezaie (Joint with W. H. Holzmann and H. Kharaghani)
  Status:   Published
  Journal: Des. Codes Cryptogr.
  Vol.:  46
  Year:  2008
  Pages:   343-352
  Supported by:  IPM
  Abstract:
A recent result of Schmidt has brought Williamson matrices back into the spotlight. In this paper a new algorithm is introduced to search for hard to find Williamson matrices. We find all nonequivalent Williamson matrices of odd order n up to n=59. It turns out that there are none for n=35, 47, 53, 59 and it seems that the Turyn class may be the only infinite class of these matrices.

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