Abstract
I will try to answer a question raised last
term by Makkai (a special case of which is
related to an old result of Kennison; maybe
I will review that) using some results in SGA4
and a construction which I believe is due to
Joyal. Although the question was raised (and
Kennison's result resides) in the context of
a sheaf representation, there is no explicit
use of such a representation in the argument.