\alpha_{1}=\frac{X(\tau_{1})y}{\parallel X(\tau_{1})\parallel},\dots,\alpha_{j%&#10;+1}=\frac{X(\tau_{j+1})y}{\parallel X(\tau_{j+1})\parallel},\alpha_{j+2}=\frac%&#10;{X(\tau_{j+2})y}{\parallel X(\tau_{j+2})\parallel}