A characterization of the Hall planes by planar and nonplanar involutions.
A combinatorial approach to the known projective planes of order nine
A combinatorial characterization of finite projective planes using strongly canonical forms of incidence matrices is presented. The corresponding constructions are applied to known projective planes of order 9. As a result a new description of the Hughes plane of order nine is obtained.
A family of complete arcs in finite projective planes
A Family of Not (V, l)-Transitivity Projective Planes of Order q3, q ... 1 (mod 3) and q ... 2.
A flag transitive plane of order 49 and its translation complement.
A geometrical characterization of the projective plane of order
A note on the derived semifield planes of order 16.
A polynomial characterization of affine spaces over GF(3)
A study of full collineation group of the projective plane of order 26.
A unified construction of finite geometries associated with -clans in characteristic 2.
A universal construction for projective Hjelmslev planes of level
Alcuni risultati sui -archi di un piano proiettivo finito
Algorithms for Finding Unitals and Maximal Arcs in Projective Planes of Order 16
The paper has been presented at the International Conference Pioneers of Bulgarian Mathematics, Dedicated to Nikola Obreshkoff and Lubomir Tschakalo ff , Sofia, July, 2006.Two heuristic algorithms (M65 and M52) for finding respectively unitals and maximal arcs in projective planes of order 16 are described. The exact algorithms based on exhaustive search are impractical because of the combinatorial explosion (huge number of combinations to be checked). Algorithms M65 and M52 use unions of orbits...
Another case of the prime power conjecture for finite projective planes.
Automorphismengruppen von Translationsebenen, die gewisse verallgemeinerte Elationen besitzen