O modelech konečných afinních rovin
Obecné konečné geometrie
On a class of partial -spreads of arising from scrolls.
On a dependence between polarities and an order of a projective plane
On a Paschian Condition for Linear Spaces.
On a planar construction of quasigroups
On Baer Subspaces of Finite Projective Spaces.
On Blocking Sets in Affine Hjelmslev Planes
ACM Computing Classification System (1998): G.2.1.We prove that the minimum size of an affine blocking set in the affine plane AHG ...This research has been supported by the Scientific Research Fund of Sofia University under Contract No 109/09.05.2012.
On Cameron-Liebler line classes.
On chirality groups and regular coverings of regular oriented hypermaps
We prove that if the Walsh bipartite map of a regular oriented hypermap is also orientably regular then both and have the same chirality group, the covering core of (the smallest regular map covering ) is the Walsh bipartite map of the covering core of and the closure cover of (the greatest regular map covered by ) is the Walsh bipartite map of the closure cover of . We apply these results to the family of toroidal chiral hypermaps induced by the family of toroidal bipartite maps...
On Collineation Groups of Finite Projective Spaces.
On compression of Bruhat--Tits buildings.
On Desargues geometrization of the characteristic of a skew field.
On Difference Matrices, Resolvable Transversal Designs and Generalized Hadamard Matrices.
On Double Transitivity in Finite Affine Planes.
On equations and properties concerning some classes of chordal polygons.
On finite circular spaces.
On finite near-circular spaces.
On finite projective planes in Lenz-Barlotti class at least I.3.
On flag-transitive anomalous -geometries.