Calculating canonical distinguished involutions in the affine Weyl groups.
Chromatic Plane Compositions
Coarse structures and group actions
The main results of the paper are: Proposition 0.1. A group G acting coarsely on a coarse space (X,𝓒) induces a coarse equivalence g ↦ g·x₀ from G to X for any x₀ ∈ X. Theorem 0.2. Two coarse structures 𝓒₁ and 𝓒₂ on the same set X are equivalent if the following conditions are satisfied: (1) Bounded sets in 𝓒₁ are identical with bounded sets in 𝓒₂. (2) There is a coarse action ϕ₁ of a group G₁ on (X,𝓒₁) and a coarse action ϕ₂ of a...
Computation of five- and six-dimensional Bieberbach groups.
Computational aspects of group extensions and their applications in topology.
Congruence, Similarity, and Symmetries of Geometric Objects.
Constructing irreducible representations of Weyl groups.
Counting crystallographic groups in low dimensions.
Crystallographic actions on Lie groups and post-Lie algebra structures
This survey on crystallographic groups, geometric structures on Lie groups and associated algebraic structures is based on a lecture given in the Ostrava research seminar in .