f(x0) = max_{a,b} min_x L(a,b,x) = max_{a,b} min_x f(x) + a*g(x) + b*h(x) = max_{a,b} f(x0)+a*g(x0)+b*h(x0) = f(x0)文章源自菜鸟学院-https://www.cainiaoxueyuan.com/suanfa/14315.html
这就是kkt条件中第一个条件:L(a, b, x)对x求导为零。文章源自菜鸟学院-https://www.cainiaoxueyuan.com/suanfa/14315.html