Generators of the unitary group of characteristic 2.
Group analysis methods for construction and investigation of the bifurcation equation
Group rings and irreducible representations of space groups.
Groups of simple and multiple antisymmetry of borders.
Groups of simple and multiple antisymmetry of similitude in
Groups of simple and multiple ribbon antisymmetry.
Gruppentheoretischer Aufbau affiner Räume einer beliebigen Dimension ... 2 auf der Grundlage von Schrägspiegelungen
Holonomy groups of five dimensional Bieberbach groups.
Holonomy groups of flat manifolds with the property
Let M be a flat manifold. We say that M has the property if the Reidemeister number R(f) is infinite for every homeomorphism f: M → M. We investigate relations between the holonomy representation ρ of M and the property. When the holonomy group of M is solvable we show that if ρ has a unique ℝ-irreducible subrepresentation of odd degree then M has the property. This result is related to Conjecture 4.8 in [K. Dekimpe et al., Topol. Methods Nonlinear Anal. 34 (2009)].
Hyperbolic monodromy groups for the hypergeometric equation and Cartan involutions
We give a criterion which ensures that a group generated by Cartan involutions in the automorph group of a rational quadratic form of signature is “thin”, namely it is of infinite index in the latter. It is based on a graph defined on the integral Cartan root vectors, as well as Vinberg’s theory of hyperbolic reflection groups. The criterion is shown to be robust for showing that many hyperbolic hypergeometric groups for are thin.
Image sampling with quasicrystals.
Infinite classes of simple and multiple antisymmetry four-dimensional point groups.
Integral quadratic forms : applications to algebraic geometry
Involutions of compact Klein surfaces.
Klein Surfaces with Maximal Symmetry and Their Groups of Automorphisms.
Konvexe Fundamentalpolyeder und einfache D-V-Zellen für 29 Raumgruppen, die Coxetersche Spiegelungsuntergruppen enthalten
L-groups of crystallographic groups.
Mathematics and crystallography.
Methods of Perfect Coloring
Metric rigidity of crystallographic groups.