# Smallest containing simplex

Let $V_n$ be the least real number such that for every convex subset of $\mathbb{R}^n$ with hypervolume $1$ there is a containing simplex with hypervolume $V_n$. What is known about $V_n$? Is there a known general formula? If not, then what is the best known bounds on $V_n$?

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Do you have an example with $V_2 > 2$? –  Michael Biro Dec 1 '11 at 3:10
No, I don't have one. –  Vladimir Reshetnikov Dec 1 '11 at 5:02

The problem seems to be still open even for $n=3$:
The paper Parallelotopes of Maximum Volume in a Simplex by Lassak gives the maximum possible volume of a parallelotope in a simplex as $n!/n^n$ times the volume of the simplex. This gives us a bound of $V_n \geq n^n/n!$, which I suspect is tight.