In addition, we have α 1 + α 2 − 2 ≥ 0 for small enough (can be shown by taking the derivative, with respect to of α 1 + α 2 − 2, which is always positive for small enough , and in addition, noticing that the value of α 1 + α 2 − 2 is 0 when = 0.)
equation (C.2) is true.