On the interior of the convex hull of a euclidean set
William Gustin · Bulletin of the American Mathematical Society · 1947
In this note we shall prove for each positive integer n the following theorem A n concerning convex sets in an w-dimensional euclidean space.THEOREM A".Any point interior to the convex hull of a set E in an n-dimensional euclidean space is interior to the convex hull of some subset of E containing at most 2n points.