Upper bounds for Heilbronn's triangle problem in higher dimensions

We develop a new simple approach to prove upper bounds for generalizations of the Heilbronn’s triangle problem in higher dimensions. Among other things, we show the following: for fixed $d\ge 1$, any subset of $[0,1{]}^d$ of size $n$ contains - $d+1$ points which span a simplex of volume at most $C_d{n}^{-\log d+6}$, - $1.1d$ points whose convex hull has volume at most $C_d{n}^{-1.1}$, - $k\ge 4\sqrt{d}$ points which span a $(k-1)$-dimensional simplex of volume at most $C_d{n}^{-\frac{k-1}{d}-\frac{k^2}{8d^2}}$.