Brinkhuis, J.

function theorem problem point duality space proof solution object condition result optimization operator sublinear sublinear functions formula operation matrix vector example descent method order analysis paper element proposition multiplier conification inequality value image theory closure section property lagrange multiplier rule calculus definition lagrange constraint statement optimization problem recession mapping conification method duality theorem subspace 2 x 2 equation application duality operator number programming d-induced fication cone c order conditions function f sublinear function optimization problems orthogonal class calculus rules check origin 1 x 1 nonzero collection matrice vectorspace v recession directions sublinear function p subset scenario variation d-induced duality lemma rn rm transformation