We obtain new examples and the complete list of the rational cuspidal plane curves C with at least three cusps, one of which has multiplicity deg C-2. It occurs that these curves are projectively rigid. We also discuss the general problem of projective rigidity of rational cuspidal plane curves.
机构:
Univ Nantes, CNRS, Lab Math Jean Leray, 2 Rue Houssiniere, F-44322 Nantes, FranceUniv Nantes, CNRS, Lab Math Jean Leray, 2 Rue Houssiniere, F-44322 Nantes, France
Golla, Marco
Starkston, Laura
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机构:
Univ Calif Davis, Dept Math, One Shields Ave, Davis, CA 95616 USAUniv Nantes, CNRS, Lab Math Jean Leray, 2 Rue Houssiniere, F-44322 Nantes, France