A pro-finite group
? is one which is the
inverse limit of a
finite
? groups
?. If we regard each of the finite
?
groups
? as having the discrete
topology, then as a subset
of their product, it has a
topology. Since all of the conditions
on an
inverse limit are closed in any Haussdorf
? space, and since
the product of compact
? spaces is compact
?, the
inverse limit
is compact
? and Hausdorff
? in the product
topology.