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Orbifold techniques in degeneration formulas (1103.5132v2)
Published 26 Mar 2011 in math.AG and math.SG
Abstract: 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.
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