The weakly inner amenable groups or (IA) groups form a very important class of locally compact groups which contains amenable groups (including abelian groups and compact groups).

• 弱内自可靠群或[IA]群是一类重要的局部紧致拓扑群，是包含可靠群（当然也包含交换群，紧致群）在内的一大类拓外群。