2006-08-15 07:22:05 · 3 answers · asked by Adriano 1 in Science & Mathematics ➔ Mathematics
What about em'? See sources for a start.
2006-08-15 07:31:07 · answer #1 · answered by hfshaw 7 · 0⤊ 0⤋
In mathematics, a Hadamard matrix is a square matrix whose entries are either +1 or â1 and whose rows are mutually orthogonal. This means that every two different rows in a Hadamard matrix represent two perpendicular vectors. Such matrices are used in error-correcting codes such as the Reed-Muller code.
Hadamard matrices are also used in balanced repeated replication (BRR), used by statisticians to estimate the variance of a parameter estimator. They are named after the French mathematician Jacques Hadamard
2006-08-15 07:30:58 · answer #2 · answered by raj 7 · 0⤊ 0⤋
They were named after the French mathematician Jacques Hadamard (1865 - 1964).
Did I guess the correct question? Did I? Did I? Huh?
Doug
2006-08-15 07:30:51 · answer #3 · answered by doug_donaghue 7 · 1⤊ 0⤋