On special projections of varieties: Epitome to a theorem of Beniamino Segre.
Andreotti-Mayer loci and the Schottky problem.
On surfaces with and non-birational bicanonical maps.
On the Hilbert Scheme of Curves of Maximal Genus in a Projective Space.
Canonical surfaces with and
Errata-Corrige : “Canonical surfaces with and ”
Perché questo volume. Presentazione del Presidente della Unione Matematica Italiana
Presentazione
Intervista a Rocco Marotta: Gödel tra arte e matematica
Curves on surfaces of degree 2r-... in Pr.
Pencils of minimal degree on curves on a K3 surface.
A series of smooth irregular varieties in projective space
On the dimension of secant varieties
In this paper we generalize Zak’s theorems on tangencies and on linear normality as well as Zak’s definition and classification of Severi varieties. In particular we find sharp lower bounds for the dimension of higher secant varieties of a given variety under suitable regularity assumptions on , and we classify varieties for which the bound is attained.
Un errore, o meglio,un orrore di 80 anni fa
Ricorrono quest'anno 80 anni dalla promulgazione delle leggi razziali da parte del regime fascista. Purtroppo in quella occasione, precisamente il 10 dicembre 1938, la Commissione Scientifica dell'Unione Matematica Italiana approvò un comunicato ingiustificabile da ogni punto di vista, umano, civile, politico e scientifico. In queste pagine, che fanno seguito all'editoriale uscito sul Notiziario dell'UMI di febbraio 2018, ricordiamo i matematici allora epurati, auspicando che un simile orrore non...
General Components of the Noether-Lefschetz Locus and their Density in the Space of all Surfaces.
Curves of minimal genus on a general abelian variety
On the existence of components of the Noether-Lefschetz Locus with given codiemsnion.
Projective degenerations of K3 surfaces, Gaussian maps and Fano threefolds.
Prym varieties and the canonical map of surfaces of general type
On the genus of reducible surfaces and degenerations of surfaces
We deal with a reducible projective surface with so-called , which are a generalization of normal crossings. First we compute the of , i.e. the dimension of the vector space of global sections of the dualizing sheaf . Then we prove that, when is smoothable, i.e. when is the central fibre of a flat family parametrized by a disc, with smooth general fibre, then the -genus of the fibres of is constant.
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