Ample and spanned vector bundles of sectional genera three.
On the iteration of the adjunction process for surfaces of negative Kodaira dimension.
On the structure of linked 3-folds.
The structure of 3-folds in P which are generally linked via a complete intersection (f,f,f) to 3-folds in P of degree d ≤ 5 is determined. We also give three new examples of smooth 3-folds in P of degree 11 and genus 9. These examples are obtained via liaison. The first two are 3-folds linked via a complete intersection (2,3,3) to 3-folds in P of degree 7: (i) the hyperquadric fibration over P and (ii) the scroll over P. The third example is Pfaffian linked to a 3-dimensional quadric in P.
Semipolarized nonruled surfaces with sectional genus two.
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