On the lattice of J-subnormal subgroups

Eine Bemerkung �ber das Reduzieren von Hallgruppen in endlichen aufl�sbaren Gruppen

Frattiniduale und Fittingklassen endlicher auflösbarer Gruppen

On the residual of a direct product

A question in the theory of saturated formations of finite soluble groups

This paper examines the following question. If\(\mathcal{H}\) and\(\mathcal{F}\) are saturated formations then\(\mathcal{H}_\mathcal{F} \) is defined to be the class of all soluble groups whose\(\mathcal{H} - normalizers\) belong to\(\mathcal{F}\). In general\(\mathcal{H}_\mathcal{F} \) is a formation, but need not be a saturated formation. Here the smallest saturated formation containing\(\mathcal{H}_\mathcal{F} \) is studied.

Die maximale lokale Erkl�rung einer ges�ttigten Formation

Zur S�ttigung einer Formation endlicher aufl�sbarer Gruppen

�ber Frattiniduale in endlichen Gruppen

On Finite Solvable Groups That Behave Like Nilpotent Groups with Respect to the Frattini Group

�ber Vertauschbarkeit, normale Einbettung und Dominanz bei Fittingklassen endlicher aufl�sbarer Gruppen

Ein Beispiel aus der Theorie der Schunckklassen