If a strictly convex Banach space P contains either a symmetric basic
sequence which is not equivalent to the I-1-basis or a normalized sequ
ence with an upper p-estimate, then there is a Banach space X such tha
t the set of norm-attaining operators is not dense in the Banach space
of all bounded linear operators from X into Y. We deduce that no infi
nite-dimensional uniformly convex Banach space has Lindenstrauss' prop
erty B. (C) 1998 Academic Press.