A combinatorial theory of Grünbaum's new regular polyhedra, Part II: Complete enumeration.
A combinatorial theory of Grünbaum's new regular polyhedra, Part I: Grünbaum's new regular polyhedra and their automorphism group.
A unified treatment of the theories of matroids with coefficients and of -matroids with coefficients.
About induced orthogonality and generalized reflections of affine coordinate plane of odd order.
Affinspiegelungen in affinen Räumen einer beliebigen Dimension ... 2
Andreev’s Theorem on hyperbolic polyhedra
In 1970, E.M.Andreev published a classification of all three-dimensional compact hyperbolic polyhedra (other than tetrahedra) having non-obtuse dihedral angles. Given a combinatorial description of a polyhedron, , Andreev’s Theorem provides five classes of linear inequalities, depending on , for the dihedral angles, which are necessary and sufficient conditions for the existence of a hyperbolic polyhedron realizing with the assigned dihedral angles. Andreev’s Theorem also shows that the resulting...
Arrangements Defined by Unitary Reflection Groups.
Automorphisms of nearly finite Coxeter groups.