Some REALLY beautiful Hadamard matrices

Authors:
J. F. Dillon
Affiliations:
National Security Agency, Fort George G. Meade, USA 20755
Venue:
Cryptography and Communications
Year:
2010

Citing 8
Cited 0

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Abstract

While all Hadamard matrices are beautiful in the eyes of the mathematician, those which arise as the 卤1-incidence matrix of a design with a regular group of automorphisms are especially appealing. This paper reviews some of the history of the development of Hadamard difference sets, illustrating some aspects with representative matrices whose beauty makes them appropriate decorations as we celebrate the birthday and the work of our friend and colleague Warwick de Launey.