(∂/(∂e))(OverHat[f])((Subscript[y, m]))>(Subscript[λ, m]),where   e=(p-(Subscript[y, m]))/\[LeftDoubleBracketingBar]p-(Subscript[y, m])\[RightDoubleBracketingBar],\[LeftDoubleBracketingBar]·\[RightDoubleBracketingBar]