Approximate group
= Approximate group
{wiki}
A $K$-approximate group is a symmetric set $H$ containing the identity such that $H+H$ is covered by at most $K$ translates of $H$.
= Approximate group
{wiki}
A $K$-approximate group is a symmetric set $H$ containing the identity such that $H+H$ is covered by at most $K$ translates of $H$.