上游充廷大￥ The Envelope Theorem 5 SHANGHAI IIAO TONG UNIVERSITY ●Objective function: f(a)=c(x(a),a) when a=ao d斯 dc(xo,ao) h(a）+ac(aa da a=ao Ox da Ba 2融，a1.a)-2- Ch (xo-ao) i=l da i=1 Ba 2016/12/22 Objective function: 2016/12/22 15     0 00 00 0 0 ( ) ( ( ), ) , , ( ) fa c a a a a df ca ca d a da da a a a          x x x x x when The Envelope Theorem 5 00 0 00 1 1 (,) () (,) l l i i i i i i h a da h a da a             xx x x