Characteristic numbers of rational curves with cusp or prescribed triple contact

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This note pursues the techniques of [Graber-Kock-Pandharipande] to give concise solutions to the characteristic number problem of rational curves in P-2 or P-1 x P-1 with a cusp or a prescribed triple contact. The classes of such loci are computed in terms of modified psi classes, diagonal classes, and certain codimension-2 boundary classes. Via topological recursions the generating functions for the numbers can then be expressed in terms of the usual characteristic number potentials.

Original languageEnglish
JournalMathematica Scandinavica
Volume92
Issue number2
Pages (from-to)223-245
Number of pages23
ISSN0025-5521
DOIs
Publication statusPublished - 2003
Externally publishedYes

    Research areas

  • ENUMERATIVE GEOMETRY, PLANE-CURVES, FORMULAS

ID: 331504679