B. Bollobas et I. Leader, GENERALIZED DUALS OF UNCONDITIONAL SPACES AND LOZANOVSKII THEOREM, Comptes rendus de l'Academie des sciences. Serie 1, Mathematique, 317(6), 1993, pp. 583-588
We consider products K. L of unconditional bodies in R(n). We prove th
at if M is the unit ball of l(p), 1 less-than-or-equal-to p less-than-
or-equal-to infinity, and K and L are unconditional bodies that are ma
ximal subject to K. L subset-of M, then K. L = M. This generalizes Loz
anovskii's theorem. We also construct an example to show that equality
need not hold for a general unconditional body M. This leads to two n
atural conjectures.