https://s0.wp.com/latex.php?latex=G%28%5Cmathbf%7Bv%7D%3B%5Cmathbf%7B%5Cmu%7D%2C%5Clambda%2Ca%29+%3D+ae%5E%7B%5Clambda%28%5Cmathbf%7B%5Cmu%7D+%5Ccdot+%5Cmathbf%7Bv%7D+-+1%29%7D++&bg=3e4244&fg=e6edf0&s=2