Das Nielsensche Realisierungsproblem für hinreichend große 3-Mannigfaltigkeiten.
Das Relationenproblem für eine Klasse von Untergruppen orthogonaler Gruppen.
Décomposition d'un groupe en produit libre ou somme amalgamée.
Decomposition of isometries of isotropic over finite fields into simple isometries
Decomposition of special Jacobi sets
Decomposition of the diagonal action of on the coinvariant space of .
Decomposition Theorems for Group Pairs.
Deformation and rigidity of simplicial group actions on trees.
Deformation theory and finite simple quotients of triangle groups I
Let with and let be the corresponding hyperbolic triangle group. Many papers have been dedicated to the following question: what are the finite (simple) groups which appear as quotients of ? (Classically, for and more recently also for general .) These papers have used either explicit constructive methods or probabilistic ones. The goal of this paper is to present a new approach based on the theory of representation varieties (via deformation theory). As a corollary we essentially prove...
Degree 1 and 2 representations of nilpotent groups and applications to units of group rings.
Dehn twists on nonorientable surfaces
Let be the Dehn twist about a circle a on an orientable surface. It is well known that for each circle b and an integer n, , where I(·,·) is the geometric intersection number. We prove a similar formula for circles on nonorientable surfaces. As a corollary we prove some algebraic properties of twists on nonorientable surfaces. We also prove that if ℳ(N) is the mapping class group of a nonorientable surface N, then up to a finite number of exceptions, the centraliser of the subgroup of ℳ(N) generated...
Der Eindeutigkeitssatz für Demuskinformationen.
Der Torsionstyp nilpotenter Gruppen
Derivation-Bounded Groups.
Des groupes magiques ou quand des sous-groupes libres affines opèrent proprement discontinûment sur
Descending Chains in Free Products.
Description chirurgicale des revêtements triples simples de ramifiés le long d’un entrelacs
Nous présentons un algorithme permettant de convertir une présentation de variété de dimension 3 comme revêtement simple à trois feuillets de la sphère en une présentation de chirurgie.
Determination of all rigid groups of order not exceeding 60
Développements récents sur les groupes de tresses. Applications à la topologie et à l'algèbre
Diagram algebras, Hecke algebras and decomposition numbers at roots of unity