Virtually abelian groups are amenable
= Virtually abelian groups are amenable
Every <abelian group> is amenable, and amenability is preserved by finite extensions. Hence every group with an abelian <finite-index subgroup> is an <amenable group>.
= Virtually abelian groups are amenable
Every <abelian group> is amenable, and amenability is preserved by finite extensions. Hence every group with an abelian <finite-index subgroup> is an <amenable group>.