Let us recall that a Boolean algebra is superatomic if every subalgebra is atomic. So by the definition, every subalgebra of a superatomic algebra is superatomic. An obvious example of a superatomic ...

This is a preview. Log in through your library . Abstract In this paper we give a new estimate of the cardinality of the product of subsets AB in a finite non-abelian simple group, where A is normal ...