A point in the interior of the convex hulls

Imre Bárány, Yun Qi

Steinitz's theorem states that if a point $a\in \mathrm{int}\mathrm{conv}X$ for a set $X\subset {\mathbb{R}}^d$, then $X$ contains a subset $Y$ of size at most $2d$ such that $a \in \m…