On a conjecture of Xiao.
On a theorem of Enriques - Swinnerton-Dyer
On complex affine surfaces with ...-action.
On covering and quasi-unsplit families of curves
Given a covering family of effective 1-cycles on a complex projective variety , we find conditions allowing one to construct a geometric quotient , with regular on the whole of , such that every fiber of is an equivalence class for the equivalence relation naturally defined by . Among other results, we show that on a normal and -factorial projective variety with canonical singularities and , every covering and quasi-unsplit family of rational curves generates a geometric extremal...
On Families of Birationally Equivalent Varieties.
On quotients of complex surfaces under complex conjugation.
On the fixed part of certain linear systems on surfaces
On the Genus of Varieties of Codimension 2 in Projective Space.
On the geometry of quadrics and their degenerations.
On the Injectivity of the Map of the Witt Group of a Scheme into the Witt Group of its Function Field.
On the motive of an algebraic surface.
On the normal bundle of curves on smooth projective surfaces.