Die Struktur kartesischer Produkte ganzer Zahlen modulo kartesische Produkte ganzer Zahlen.
Die Umkehrung des Satzes von Brauer-Berman-Witt über induzierte Charaktere endlicher Gruppen.
Die unimodularen Substitutionen in einem algebraischen Zahlenkörper
Die unteren Zentralreihen und Kommutatorreihen spezieller Kongruenzuntergruppen in SL(2,....)
Die Untergruppen der freien Produkte von beliebigen Gruppen
Die Untergruppenstruktur der Gruppen mit quadratfreier Ordnung.
Die Untergruppenverbände von Gruppen, deren Ordnungen höchstens drei Primfaktoren enthalten.
Die Unterscheidung von Homotopietyp und einfachem Homotopietyp bei zweidimensionalen Komplexen.
Die unzerlegbaren, positiv-definiten Klassenfunktionen der abzählbar unendlichen, symmetrischen Gruppe.
Die...-Klassen der endlichen symmetrischen Halbgruppen und ihre Mächtigkeiten.
Difference equations on discrete polynomial hypergroups.
Differences in sets of lengths of Krull monoids with finite class group
Let be a Krull monoid with finite class group where every class contains some prime divisor. It is known that every set of lengths is an almost arithmetical multiprogression. We investigate which integers occur as differences of these progressions. In particular, we obtain upper bounds for the size of these differences. Then, we apply these results to show that, apart from one known exception, two elementary -groups have the same system of sets of lengths if and only if they are isomorphic.
Differentiability of a convex semigroup on IRm.
Differenzmengen und zweifach transitive Permutationsgruppen von Primzahlgrad.
Dihedral -tilings of the sphere by equilateral and scalene triangles. II.
Dihedral f-tilings of the sphere by equilateral and scalene triangles. III.
Dihedral f-tilings of the sphere by equilateral and scalene triangles-I
Dihedral-like constructions of automorphic loops
Automorphic loops are loops in which all inner mappings are automorphisms. We study a generalization of the dihedral construction for groups. Namely, if is an abelian group, and , let be defined on by The resulting loop is automorphic if and only if or ( and is even). The case was introduced by Kinyon, Kunen, Phillips, and Vojtěchovský. We present several structural results about the automorphic dihedral loops in both cases.
Dimension in rings with solvable algebraic group action.
Dimension sugroups of metabelian groups.