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Hi, all, Does anybody got the most general expression of a unitary matrix? I found one in the book, four entries of the matrix are: (cos\theta) exp(j\alpha); -(sin\theta)exp(j(\alpha-\Omega)); (sin\theta)exp(j...
Dear All, I use nlminb or optim for maximizing likelihood functions. Sometimes, the parameter values happen to be NA, then the program will hang there and iterate forever without stopping. No error message will be produced. So I can not...
Thank you, Spencer. I read through the websites you suggested. What I need is how to parameterize a 2\times 2 unitary matrix. Generally, since for a complex 2\times 2 matrix, there are 8 free variables, and for it...
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