Wall-Crossings in Toric Gromov-Witten Theory II: Local Examples

Details Wall-Crossings in Toric Gromov-Witten Theory II: Local Examples Wall-Crossings in Toric Gromov-Witten Theory II: Local Examples

2008-04-16

arxiv.org/abs/0804.2592v1

Mathematics

Algebraic Geometry

37 pages

Scientific paper

In this paper we analyze six examples of birational transformations between toric orbifolds: three crepant resolutions, two crepant partial resolutions, and a flop. We study the effect of these transformations on genus-zero Gromov-Witten invariants, proving the Coates-Corti-Iritani-Tseng/Ruan form of the Crepant Resolution Conjecture in each case. Our results suggest that this form of the Crepant Resolution Conjecture may also hold for more general crepant birational transformations. They also suggest that Ruan's original Crepant Resolution Conjecture should be modified, by including appropriate "quantum corrections", and that there is no straightforward generalization of either Ruan's original Conjecture or the Cohomological Crepant Resolution Conjecture to the case of crepant partial resolutions. Our methods are based on mirror symmetry for toric orbifolds.

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