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arXiv:1103.5132 [math.AG]AbstractReferencesReviewsResources

Orbifold techniques in degeneration formulas

Dan Abramovich, Barbara Fantechi

Published 2011-03-26, updated 2014-08-04Version 2

We give an approach for relative and degenerate Gromov--Witten invariants, inspired by that of Jun Li but replacing predeformable maps by transversal maps to a twisted target. The main advantage is a significant simplification in the definition of the obstruction theory. We reprove in our language the degeneration formula, extending it to the orbifold case.

Comments: Some material which is now in arXiv:1406.2166 and in arXiv:1110.2976 was removed
Categories: math.AG, math.SG
Subjects: 14N35, 14D22
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