A characterization of collineations by order geometry.
A generalization of the Schwarzian via Clifford numbers.
A non-homogeneous, symmetric contact projective structure
We construct a non-homogeneous contact projective structure which is symmetric from the point of view of parabolic geometries.
A projective characterization of the Veronese surface
Alcuni invarianti di contatto di due varietà in uno spazio proiettivo
Algebraic geometry and local differential geometry
Applications of spectral geometry to affine and projective geometry.