上游充通大￥ The Envelope Theorem 2 SHANGHAI IIAO TONG UNIVERSITY Assuming f(a)is differentiable;x is given,the corresponding optimal solution is a,then: df ar 三 aca）-2ha da \a=ao Da la=ao Ba i=1 2016/12/22Assuming is differentiable; is given, the corresponding optimal solution is ，then: 2016/12/22 12 f  a  0 a 0 x 0 0 00 00 1 (,) (,) k i i aa aa i df ca h a da a a a             x x The Envelope Theorem 2