Note that the theorem does not hold when the assumption that M is sup-
ported in the definition of M(P
t
) is dropped. Indeed, let Ρ be ρ \q. Then
Pj is empty, so Up =0 and Af(Pj) = M
x
= 0. On the other hand M
2
= {p}
whereas
Our purpose in this and the next section is to study the foundation ...
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