A Barth-Lefschetz type theorem for branched coverings of Grassmannians.
A Barth-Type Theorem for Branched Coverings of Projective Space.
A Bound on the Order of Jumping Lines.
A characterization of ample vector bundles on a curve.
A characterziation of IPn by vector bundles.
A Class of Indecomposable Algebraic Vector Bundles.
A class of n-bundles on Gr (k, n).
A Cohomological Characterization of IPn.
A Comparison Theorem.
A computer aided approach to codimension 2 subvarities of Pn, n ... 6.
A Criterion for the Canonical Bundle of a 3-Fold to be Amble.
A Criterion for the Splitting of a Vector Bundle.
A criterion for virtual global generation
Let be a smooth projective curve defined over an algebraically closed field , and let denote the absolute Frobenius morphism of when the characteristic of is positive. A vector bundle over is called virtually globally generated if its pull back, by some finite morphism to from some smooth projective curve, is generated by its global sections. We prove the following. If the characteristic of is positive, a vector bundle over is virtually globally generated if and only if for...
A criterion of openness of a family of nef line bundles.
A curve of genus with a Half-Canonical embedding in
Si costruiscono curve di genere , che hanno fasci semicanonici tali che . Per si dimostra che gli sono molto ampi.
A Decomposability Criterion for Algebraic 2-Bundles on Projective Spaces.
A description of Chern classes of semistable sheaves on a quadric surface.
A duality result for moduli spaces of semistable sheaves supported on projective curves
A Fixed Point Formula for Action of Tori on Algebraic Varieties.
A footnote to a paper by Noma
Let be a globally generated ample vector bundle of rank on a complex projective smooth surface . By extending a recent result by A. Noma, we classify pairs as above satisfying .