The Hartshorne-Rao module of curves on rational normal scrolls
Keywords:
Curve, Cohomology groupAbstract
We study the Hartshorne-Rao module of curves lying on a rational normal scroll S_e of invariant e ≥ 0 in P^{e+3} .
We calculate the Rao function, we characterize the aCM curves on S_e .
Finally, we give an algorithm to check if a curve is aC M or not and, in
the second case, to calculate the Rao function.
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