Hi, I hope someone can help me out with this problem:
Let set S be defined by (x in En :f(x) <=c}
f: En -> E1 is convex and differentiable and gradient of f(xo) is not 0 when f(x) = c. Let xo be a point such that f(xo) = c and let d = gradient at xo. Let lamda be any positive number and...