Closed convex hull
= Closed convex hull
{title2=$\overline{\operatorname{co}}(C)$}
The smallest closed <convex set> containing a set $C$, equivalently the closure of its <convex hull> in the specified <topology>. The topology must be stated: the <norm topology>, <weak topology> and <weak-star topology> need not give the same closure for an arbitrary set.