A Hadamard matrix of order 428

H Kharaghani, B Tayfeh‐Rezaie - Journal of Combinatorial …, 2005 - Wiley Online Library
… of length 3n Ā 1 and thus Hadamard matrices of order 4ð3n Ā 1Þ. Turyn [8] … Hadamard
matrices with the first one being of order 428. This is the smallest order for which the Hadamard

On the classification of Hadamard matrices of order 32

H Kharaghani, B Tayfeh‐Rezaie - Journal of Combinatorial …, 2010 - Wiley Online Library
Order 32 is where a combinatorial explosion occurs on the number of Hadamard matrices.
We find all equivalence classes of Hadamard matrices of order 32 which are of certain types. …

[图书][B] Hadamard matrices and their applications

KJ Horadam - 2012 - books.google.com
Hadamard matrices, generalised Hadamard matrices and higher dimensional Hadamard
matrices … was known was n = 268 = 4·67 [145]; then until 2004 it was n = 428 = 4·107 [202]. At …

On some applications of Hadamard matrices

J Seberry, B JWysocki, T AWysocki - Metrika, 2005 - Springer
Hadamard matrix is H-equivalent to an Hadamard matrix which has every element of its first
row and column equal to +1 — matrices … (vi) if H4n is a normalized Hadamard matrix of order

Complex hadamard matrices

J Wallis - Linear and Multilinear Algebra, 1973 - Taylor & Francis
Hadamard matrix of order c and a real Hadamard matrix of order h > 1, then there is a real
Hadamard matrix of orderHadamard matrices were only known for a few small orders and the …

(v, k, λ) configurations and Hadamard matrices

J Wallis - Journal of the Australian Mathematical Society, 1970 - cambridge.org
… An Hadamard matrix H is a matrix of order n, all of whose elements … Hadamard matrix exists
for n = 2 and for n = At, where t is any positive integer. Many classes of Hadamard matrices

Complex Hadamard matrices of order 6: a four‐parameter family

F Szöllősi - Journal of the London Mathematical Society, 2012 - Wiley Online Library
Hadamard matrices of small orders, and one of the main achievements of this paper. We apply
this result to obtain complex Hadamard matrices… of complex Hadamard matrices of order 6…

Classification of Hadamard matrices of order 24 and 28

E Spence - Discrete mathematics, 1995 - Elsevier
… those in standard form, or equivalently, those incidence matrices of symmetric 2-(4n - l, 2n …
Hadamard matrix they determine. Thus to find all non-isomorphic Hadamard matrices of order

The cocyclic Hadamard matrices of order less than 40

P Ó Catháin, M Röder - Designs, Codes and Cryptography, 2011 - Springer
Hadamard matrices of orders 32 and 36 are known. Thus we use a different method to construct
all cocyclic Hadamard matrices at these orders… cocyclic Hadamard matrices and relative …

A database of constructions of Hadamard matrices

M Cati, DV Pasechnik - arXiv preprint arXiv:2411.18897, 2024 - arxiv.org
… Abstract Hadamard matrices of order n are conjectured to … for skew Hadamard matrices. We
provide constructions covering … -)Hadamard matrices do not work for the order 2m509203, for …