Non-degenerate curves with maximal Hartshorne-Rao module

Details Non-degenerate curves with maximal Hartshorne-Rao module Non-degenerate curves with maximal Hartshorne-Rao module

2002-09-21

arxiv.org/abs/math/0209280v1

Mathematics

Algebraic Geometry

Scientific paper

Extending results for space curves we establish bounds for the cohomology of a non-degenerate curve in projective $n$-space. As a consequence, for any given $n$ we determine all possible pairs $(d, g)$ where $d$ is the degree and $g$ is the (arithmetic) genus of the curve. Furthermore, we show that curves attaining our bounds always exist and describe properties of these extremal curves. In particular, we determine the Hartshorne-Rao module, the generic initial ideal and the graded Betti numbers of an extremal curve.

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