Proof for, Vectors sampled from $D_{(L,r)}$ have Euclidean norm at most $r\sqrt{n}$ with a high probability
Posted by Anwar, at crypto.stackexchange.com,
For any $n$-dimensional lattice $L$ and $r > 0$, a point sampled from $D_{L,r}$ has Euclidean norm at most $r\sqrt{n}$ except…