Constructing Hadamard matrices

A Hadamard matrix is an orthogonal matrix whose entries are all either 1 or − 1. For example is a Hadamard matrix of order 2. True to Stigler s law of eponymy, James Joseph Sylvester investigated Hadamard matrices before Jacques Hadamard. Sylvester saw how to bootstrap the example above into more examples. If H is a [ ] The post Constructing Hadamard matrices first appeared on John D. Cook .