Zl. Chen et Aw. Wickstead, INCOMPLETENESS OF THE LINEAR SPAN OF THE POSITIVE COMPACT-OPERATORS, Proceedings of the American Mathematical Society, 125(11), 1997, pp. 3381-3389
We show that even in the case of a Banach lattice E with an order cont
inuous norm (or whose dual has an order continuous norm) the linear sp
an of the positive compact operators on E need not be complete under t
he regular norm.