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Projective Bundles of Singular Plane Cubics

✍ Scribed by Stefan Kebekus

Publisher: John Wiley and Sons
Year: 2002
Tongue: English
Weight: 212 KB
Volume: 242
Category: Article
ISSN: 0025-584X
DOI: 10.1002/1522-2616(200207)242:1<119::aid-mana119>3.0.co;2-r

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✦ Synopsis

Classification theory and the study of projective varieties which are covered by rational curves of minimal degrees naturally leads to the study of families of singular rational curves. Since families of arbitrarily singular curves are hard to handle, it has been shown in [Keb00] that there exists a partial resolution of singularities which transforms a bundle of possibly badly singular curves into a bundle of nodal and cuspidal plane cubics.

In cases which are of interest for classification theory, the total spaces of these bundles will clearly be projective. It is, however, generally false that an arbitrary bundle of plane cubics is globally projective. For that reason the question of projectivity and the study of moduli seems to be of interest, and the present work gives a characterization of the projective bundles.

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