2 papers
math.AG2019
On the hypersurfaces contained in their Hessian
Pietro De Poi, Giovanna Ilardi
This article presents the theory of focal locus applied to the hypersurfaces in the projective space which are (finitely) covered by linear spaces and such that the tangent space i…
math.AG2004
On first order Congruences of Lines in with irreducible fundamental Surface
Pietro De Poi
In this article we study congruences of lines in , and in particular of order one. After giving general results, we obtain a complete classification in the case of $\…