I don't understand how to find Phi. I am reading Sudarsky's paper from January, and in it he says how to find phi from alpha, mu and mu0, but phi only goes from zero to pi. My reflections aren't symetrical, so I need to know how to find if phi is positive or negative. This might be incomprehensible. I know it is incomprehensible to me. But, if someone can help, get in touch.