On the number of facets of three-dimensional Dirichlet stereohedra. II: Non-cubic groups.
On the number of sums and products
On the Orbits of Collineation Groups.
On the orbits of Singer groups and their subgroups.
On the ordered sets in -dimensional real inner product spaces.
On the planar translation structures
On the planarity of the equilateral, isogonal pentagon.
On the plane geometry with generalized absolute value metric.
On the rank of random subsets of finite affine geometry
The aim of the paper is to give an effective formula for the calculation of the probability that a random subset of an affine geometry AG(r-1,q) has rank r. Tables for the probabilities are given for small ranks. The expected time to the first moment at which a random subset of an affine geometry achieves the rank r is derived.
On the regular polygons in the Chinese checker plane.
On the Regularity of Alexandrov Surfaces with Curvature Bounded Below
In this note, we prove that on a surface with Alexandrov’s curvature bounded below, the distance derives from a Riemannian metric whose components, for any p ∈ [1, 2), locally belong to W1,p out of a discrete singular set. This result is based on Reshetnyak’s work on the more general class of surfaces with bounded integral curvature.
On the relation between ordered sets and Lorentz--Minkowski distances in real inner product spaces.
On the Representation and Multiplication of Basic Alternating Cycle Matrices
On the sectional irregularity of congruences.
On the size of maximal caps in .
On the smallest minimal blocking sets in projective space generating the whole space.
On the spectrum of resolvable orthogonal arrays invariant under the Klein group K4.
On the Structure of Finite Collineation Groups Containing Symmetries of Generalized Quadrangles.
On the superadditivity of secant defects
On the tangency of sets in generalized metric spaces for certain functions of the class