Non-squeezing theorem (source code)

= Non-squeezing theorem
{wiki}

= Gromov non-squeezing theorem
{c}
{synonym}

If there is a symplectic embedding
$$
B^{2n}(R)\hookrightarrow B^2(r)\times\mathbb R^{2n-2},
$$
then $R\leq r$. Symplectic volume alone does not imply this radius obstruction.