Ro Bichara, Hans Havlicek, Corrado Zanella, Hans Havlicek, Klaus List, Corrado Zanella, ...
[3] Hans Havlicek and Corrado Zanella, On embedded products of Grassmannians, Discrete
Lifting of divisible designs (2008)
Andrea Blunck, Hans Havlicek, Corrado Zanella
Dedicated to Walter Benz on the occasion of his 75th birthday The aim of this paper is to present a construction of t-divisible designs for t> 3, because such divisible designs seem to be missing...
On linear morphisms of product spaces (2008)
Ro Bichara, Hans Havlicek, Corrado Zanella
Let χ be a linear morphism of the product of two projective spaces PG(n, F) and PG(m, F) into a projective space. Let γ be the Segre embedding of such a product. In this paper we give some...
Blocking sets in chain geometries (2008)
Andrea Blunck, Hans Havlicek, Corrado Zanella
2. Examples of chain geometries (4). 3. Finite chain geometries (5).
On Automorphisms of Ag Spaces (2007)
Hans Havlicek Klaus, Klaus List, Corrado Zanella
We show that the automorphisms of the ag space associated with a 3dimensional projective space can be characterized as bijections preserving a certain binary relation on the set of ags in both...
Divisible designs from twisted dual numbers (2007)
Andrea Blunck, Hans Havlicek, Corrado Zanella
The generalized chain geometry over the local ring K(ε, σ) of twisted dual numbers, where K is a finite field, is interpreted as a divisible design obtained from an imprimitive group action. Its...
On embedded products of Grassmannians ∗ (2001)
Hans Havlicek, Corrado Zanella
Let Γ ′ and Γ be two Grassmannians. The standard embedding φ: Γ ′ × Γ → P is obtained by combining the Plücker and Segre embeddings. Given a further embedding η: Γ ′ × Γ → P ′...
On Automorphisms of Flag Spaces (2000)
Hans Havlicek, Klaus List, Corrado Zanella
We show that the automorphisms of the ag space associated with a 3-dimensional projective space can be characterized as bijections preserving a certain binary relation on the set of flags in both...
On linear morphisms of product spaces (1999)
Alessandro Bichara, Hans Havlicek, Corrado Zanella
Let be a linear morphism of the product of two projective spaces PG(n; F) and PG(m;F) into a projective space. Let be the Segre embedding of such a product. In this paper we give some sucient...
Hans Havlicek, Corrado Zanella
. The quadratic Veronese embedding ae maps the point set P of PG(n; F ) into the point set of PG( \Gamma n+2 2 \Delta \Gamma 1; F ) (F a commutative field) and has the following well-known property:...
Hans Havlicek, Corrado Zanella
The quadratic Veronese embedding ρ maps the point set P of PG(n, F) into the point set of PG ( �n+2 � − 1, F) (F a commutative 2 field) and has the following well-known property: If M ⊂ P,...
Universal Properties of the Corrado Segre Embedding (1996)
Let 0 , # 1 )betheproduct of the projective spaces # 0 and # 1 , i.e. the semilinear space whose point set is the product of the point sets of # 0 and # 1 , and whose lines are all products of the...