Squeezing the Accordion in a Strongly n-Uniform Hjelmslev Plane.
Strongly n-Uniform and Level n-Hjelmslev Planes.
Strongly regular locally -graphs.
Subplane replacement in projective planes.
Substitutions, abstract number systems and the space filling property
In this paper we study multi-dimensional words generated by fixed points of substitutions by projecting the integer points on the corresponding broken halfline. We show for a large class of substitutions that the resulting word is the restriction of a linear function modulo and that it can be decided whether the resulting word is space filling or not. The proof uses lattices and the abstract number system associated with the substitution.
Sulla famiglia dei flocks lineari di una quadrica iperbolica assolutamente irriducibile di uno spazio proiettivo finito
In questa Nota diamo una caratterizzazione dell'insieme di tutti i flocks lineari della quadrica iperbolica assolutamente irriducibile in .
Teilmengengraphen und projektive Räume.
Ternary linear codes and quadrics.
The cyclic -clans with .
The geometry of in translation planes of even order .
The geometry of GL(2,q) in translation planes of even order (Corrigendum).
The Mathieu group and its pseudogroup extension .
The maximum size of a partial spread in is .
The minimum rank problem over finite fields.
The nonexistence of certain projective planes of order 15.
The nonexistence of regular near octagons with parameters .
The Order of Points on the Second Convex Hull of a Simple Polygon.
The toric ideal of a matroid of rank 3 is generated by quadrics.
The Tutte group of projective spaces.
The universal embedding of the near polygon .