Two Hadamard matrices of order 956 of Goethals-Seidel type

Combinatorica volume 14, pages375–377(1994)Cite this article

Abstract

No Hadamard matrices of order 956 appear in the literature. In this note we construct two such matrices. They are both of Goethals-Seidel type. As a consequence of this and of a result of Seberry and Yamada, we conclude that there exist 4-Williamson type matrices of order 1913.

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Affiliations

  1. Department of Pure Mathematics, University of Waterloo, N2L 3G1, Ontario, Waterloo, Canada

    Dragomir Ž. Đoković

Authors
  1. Dragomir Ž. Đoković
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Additional information

This work was supported by NSERC of Canada Grants A-5285 and EQP0107539.

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Đoković, D.Ž. Two Hadamard matrices of order 956 of Goethals-Seidel type. Combinatorica 14, 375–377 (1994). https://doi.org/10.1007/BF01212983

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AMS subject classification code (1991)

  • 05 B 20
  • 05 B 30