Hadamard matrices are designs

[John P. Morgan]

Hi Jennifer,

You are quite right, there are pieces we are missing. If you check the "t-design 
properties" section of the external rep, you will see the statement "More 
properties will be included here." One property not currently listed is 
"Hadamard design." I believe it should be added.

We are very happy to receive suggestions for properties we have missed - indeed 
a prime purpose of our public announcement was to invite just this. Please  
examine the current external representation for block designs. It is a work in 
progress, to which we welcome suggestions. If there are indicators, properties, 
etc that you think should be there, please feel free to identify them here. Your 
help will be greatly appreciated!  JP


John P Morgan
Department of Statistics
Virginia Tech


>Date: Fri, 19 Sep 2003 11:09:21 +1000
>Jennifer Seberry <jennie at uow.edu.au> wrote

>Dear All,
>I think you forgot me and my books
>W.D. Wallis, Anne Penfold Street and Jennifer Seberry Wallis, {\em
>Combinatorics : Room Squares, Sum-free
>Sets, Hadamard Matrices}, {\bf 292}, Lecture Notes in Mathematics,
>Springer--Verlag, Berlin--Heidelberg--New York, (1972), 508 pages.
>
>
>{\bf B} A.V.Geramita and Jennifer Seberry, {\em Orthogonal Designs: 
>Quadratic forms and Hadamard matrices}, Marcel Dekker, New York - Basel,
>(1979),  pages.
>
>Also I have material on my webpage see below for URL.
>
>-- 
>Jennifer Seberry