Convex Optimization
Gradient && Hessian The gradient of a f, d x 1, can be represented as follow ∇f(x)=[∂f(x)∂x1…∂f(x)∂xd]
and the Hessian, d x d, can be represented as
∇2f(x)=[∂2f(x)∂x21∂2f(x)∂x1x2∂2f(x)∂x1xd………∂2f(x)∂x2d∂2f(x)∂xdx2∂2f(x)∂xdxd]……