A Duality Theorem for Complex Manifolds.
On polarized surfaces with small generalized class.
Elliptic sufaces with a nef line bundle of genus two.
Complex projective elliptic surfaces endowed with a numerically effective line bundle of arithmetic genus two are studied and partially classified. A key role is played by elliptic quasi-bundles, where some ideas developed by Serrano in order to study ample line bundles apply to this more general situation.
On the class of some projective varieties.
Some inequalities between the class and the degree of a smooth complex projective manifold are given. Application to the case of low sectional genus are supplied.
Surfaces in with no quadrisecant lines.
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