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- Corrado Zanella
- Des. Codes Cryptography
- 1998

- Andrea Blunck, Hans Havlicek, Corrado Zanella
- Des. Codes Cryptography
- 2007

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 in the literature. To this end, tools such as finite projective spaces and their algebraic varieties are employed. More precisely, in a first step an abstract construction, called t-lifting, is developed. It starts from a… (More)

- Corrado Zanella
- 1996

Let S(Π0,Π1) be the product of the projective spaces Π0 and Π1, i.e. the semilinear space whose point set is the product of the point sets of Π0 and Π1, and whose lines are all products of the kind {P0}×g1 or g0×{P1}, where P0, P1 are points and g0, g1 are lines. An embedding χ : S(Π0,Π1) → Π′ is an injective mapping which maps the lines of S(Π0,Π1) onto… (More)

- Eva Ferrara Dentice, Corrado Zanella
- Discrete Mathematics
- 2006

In this paper both blocking sets with respect to the s-subspaces and covers with t-subspaces in a finite Grassmannian are investigated, especially focusing on geometric descriptions of blocking sets and covers of minimum size. When such a description exists, it is called a Bose–Burton type theorem. The canonical example of a blocking set with respect to the… (More)

The quadratic Veronese embedding ρ maps the point set P of PG(n, F ) into the point set of PG( (n+2 2 ) − 1, F ) (F a commutative field) and has the following well-known property: If M ⊂ P, then the intersection of all quadrics containing M is the inverse image of the linear closure of Mρ. In other words, ρ transforms the closure from quadratic into linear.… (More)

- Alessandro Bichara, Corrado Zanella
- Discrete Mathematics
- 1999

- Corrado Zanella
- Discrete Mathematics
- 2006

- Andrea Pavan, Corrado Zanella
- Discrete Mathematics
- 2012

A linear partial spread is a set of mutually skew lines of some P(V ) – where V is a finite dimensional vector space over a field – that are characterized by the property that their images under the Plücker embedding are in a given subspace of P (∧2 V ); it is a linear spread if the lines in it cover the whole space. We will provide methods to construct… (More)

- Simona Bonvicini, Corrado Zanella
- Discrete Mathematics
- 2010

In this paper a generalisation of the notion of polarity is exhibited which allows to completely describe, in an incidence-geometric way, the linear complexes of h-subspaces. A generalised polarity is defined to be a partial map which maps (h−1)-subspaces to hyperplanes, satisfying suitable linearity and reciprocity properties. Generalised polarities with… (More)