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Proceedings of the American Mathematical Society

Published by the American Mathematical Society, the Proceedings of the American Mathematical Society (PROC) is devoted to research articles of the highest quality in all areas of pure and applied mathematics.

ISSN 1088-6826 (online) ISSN 0002-9939 (print)

The 2020 MCQ for Proceedings of the American Mathematical Society is 0.85.

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Hadamard matrices and $\delta$-codes of length $3n$
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by C. H. Yang PDF
Proc. Amer. Math. Soc. 85 (1982), 480-482 Request permission

Abstract:

It is found that four-symbol $\delta$-codes of length $t = 3n$ can be composed for odd $n \leqslant 59$ or $n = {2^a}{10^b}{26^c} + 1$, where all $a$, $b$ and $c \geqslant 0$. Consequently new families of Hadamard matrices of orders $4tw$ and $20tw$ can be constructed, where $w$ is the order of Williamson matrices.
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Additional Information
  • © Copyright 1982 American Mathematical Society
  • Journal: Proc. Amer. Math. Soc. 85 (1982), 480-482
  • MSC: Primary 05B20; Secondary 62K10, 94A29
  • DOI: https://doi.org/10.1090/S0002-9939-1982-0656128-3
  • MathSciNet review: 656128