(Linear Algebra) & B (Convex and Concave Functions)
... convex if the Hessian matrix of f is positive definite or positive semi-definite for all values of x1, x2 ,…, xn. • Test for concavity of a function: A function f is convex if the Hessian matrix of f is negative definite or negative semi-definite for all values of x1, x2 ,…, xn. ...
... convex if the Hessian matrix of f is positive definite or positive semi-definite for all values of x1, x2 ,…, xn. • Test for concavity of a function: A function f is convex if the Hessian matrix of f is negative definite or negative semi-definite for all values of x1, x2 ,…, xn. ...
