Linear Series on Ribbons
نویسنده
چکیده
A ribbon is a double structure on P. The geometry of a ribbon is closely related to that of a smooth curve. In this note we consider linear series on ribbons. Our main result is an explicit determinantal description for the locus W r 2n of degree 2n line bundles with at least (r +1)-dimensional sections on a ribbon. We also discuss some results of Clifford and Brill-Noether type.
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