Obecné konečné geometrie
On a class of partial -spreads of arising from scrolls.
On a discrete version of the antipodal theorem
The classical theorem of Borsuk and Ulam [2] says that for any continuous mapping there exists a point such that f(-x) = f(x). In this note a discrete version of the antipodal theorem is proved in which is replaced by the set of vertices of a high-dimensional cube equipped with Hamming’s metric. In place of equality we obtain some optimal estimates of which were previously known (as far as the author knows) only for f linear (cf. [1]).
On Baer Subspaces of Finite Projective Spaces.
On collineation groups of translation planes of order .
On Difference Matrices, Resolvable Transversal Designs and Generalized Hadamard Matrices.
On elations in semi-transitive planes.
On flag-transitive anomalous -geometries.
On Incidence Structures in Finite Classical Groups.
On M.D.S. codes, arcs in PG(n,q) with q even, and a solution of three fundamental problems of B. Segre.
On multiple nuclei and a conjecture of Lunelli and Sce.
On Norm Three Vectors in Integral Euclidean Lattices. I.
On optimal linear codes over .
On Projective Plane of Order 13 with a Frobenius Group of Order 39 as a Collineation Group
One of the most outstanding problems in combinatorial mathematics and geometry is the problem of existence of finite projective planes whose order is not a prime power.
On Projective Planes of Type (5, m).
On -clan geometry, .
On Representing Sylvester-Gallai Designs.
On some hyperbolic planes from finite projective planes.
On 's and 's admitting a semiregular automorphism group of order 9.
On Subdesigns of Symmetric Designs.