On Property B and on Steiner Systems.
On Representing Sylvester-Gallai Designs.
On Squashed Designs.
On the construction of non-isomorphic Steiner quadruple systems
On the Existence of Room Squares of Order 4n
On the General Motion-Planning Problem with Two Degrees of Freedom.
On the Structure of Affine Designs.
On the Structure of Finite Collineation Groups Containing Symmetries of Generalized Quadrangles.
On the structure of the Steiner triple systems derived from the Steiner quadruple systems
On translation transversal designs
Orthogonal designs II.
Orthogonal packings in PG(5, 2).
Orthogonal permutation arrays and related structures
Orthogonal Resolutions and Latin Squares
Resolutions which are orthogonal to at least one other resolution (RORs) and sets of m mutually orthogonal resolutions (m-MORs) of 2-(v, k, λ) designs are considered. A dependence of the number of nonisomorphic RORs and m-MORs of multiple designs on the number of inequivalent sets of v/k − 1 mutually orthogonal latin squares (MOLS) of size m is obtained. ACM Computing Classification System (1998): G.2.1.∗ This work was partially supported by the Bulgarian National Science Fund under Contract No...
Orthogonal systems.
Packing graphs: The packing problem solved.
Pairs of disjoint -element subsets far from each other.
Permutations and Copi mats, Chidenguele, Mozambique
Plongements lipschitziens dans un espace pentagonal
Poincaré and graph theory