More inequalities for positive semidefinite 2 x 2 block matrices and their blocks

摘要

It is obtained that for positive semidefinite block matrix H = [M K K* N] if A, B is an element of M-n (C) such that max(parallel to A parallel to(2), parallel to B parallel to(2)) <= 2 and f is a nonnegative increasing convex function on [0, infinity) satisfying f (0) = 0, then