O jisté ploše bikvadratické, jež souvisí s theorií komplexu os rotačních ploch kuželových jdoucích třemi danými body
O křivkovém a plošném elementu třetího řádu projektivního prostoru
O šestnáctém Hilbertově problému
On 3-folds in which are scrolls
On blowing down projective spaces in singular varieties.
On Castelnuovo's equivalence defect.
On codimension-two subvarieties of hypersurfaces.
On completing conics
On contributions of embedded components to intersection theory, a first approach
On degenerate secant varieties of secant defect two.
On hypersurfaces in with fat points in general position.
On inflection points of some type of quartics with a single triple point
On inflection points of the plane quartic with two nodal and one flexnodal points
On osculating cones and the Riemann-Kempf singularity theorem for hyperelliptic curves, trigonal curves, and smooth plane quintics
On polarized surfaces with small generalized class.
On Postulation of Curves in IP4.
On projective degenerations of Veronese spaces
Here we give several examples of projective degenerations of subvarieties of . The more important case considered here is the d-ple Veronese embedding of ; we will show how to degenerate it to the union of n-dimensional linear subspaces of and the union of scrolls. Other cases considered in this paper are essentially projective bundles over important varieties. The key tool for the degenerations is a general method due to Moishezon. We will give elsewhere several applications to postulation...
On ramified covers of the projective plane II: Generalizing Segre’s theory
The classical Segre theory gives a necessary and sufficient condition for a plane curve to be a branch curve of a (generic) projection of a smooth surface in . We generalize this result for smooth surfaces in a projective space of any dimension in the following way: given two plane curves, and , we give a necessary and sufficient condition for to be the branch curve of a surface in and to be the image of the double curve of a -model of . In the classical Segre theory, a plane curve...
On secant spaces to projective curves
On second fundamental forms of projective varieties.