Die Anwendung der Polarität auf die direkten Produktzerlegungen einer Gruppe
Die atomare Struktur topologischer Boolescher Ringe und s-beschränkter Inhalte
Die Operationen in der Klasse komplementärer Verbände
Disjoint sequences in Boolean algebras
We deal with the system of all sequential convergences on a Boolean algebra . We prove that if is a sequential convergence on which is generated by a set of disjoint sequences and if is any element of , then the join exists in the partially ordered set . Further we show that each interval of is a Brouwerian lattice.